LYONS, OR · Linn County

LYONS MEHAMA WATER DISTRICT Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Oregon’s official records. Always confirm current status with Oregon before making decisions based on this information.

System facts

System ID (PWSID): OR4100493
System type: Community Water System
Population served: 1,300
Service connections: 824
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
August 1, 2025 – August 31, 2025
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
August 1, 2025 – August 31, 2025
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
August 1, 2025 – August 31, 2025
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2025 – September 19, 2025
Resolved
Initial, Follow-up, or Routine Source Water M/R
—
Lead and Copper Rule
July 1, 2025 – October 1, 2025
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
April 1, 2025 – April 30, 2025
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
April 1, 2025 – April 30, 2025
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
April 1, 2025 – April 30, 2025
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
February 1, 2025 – February 28, 2025
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
February 1, 2025 – February 28, 2025
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
February 1, 2025 – February 28, 2025
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
February 1, 2025 – February 28, 2025
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2025 – December 31, 2025
Archived
Initial, Follow-up, or Routine Source Water M/R
—
Lead and Copper Rule
January 1, 2025 – March 31, 2025
Resolved
Initial, Follow-up, or Routine Source Water M/R
—
Lead and Copper Rule
January 1, 2025 – June 3, 2025
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2025 – December 31, 2025
Archived
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
December 1, 2024 – December 31, 2024
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
December 1, 2024 – December 31, 2024
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
December 1, 2024 – December 31, 2024
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
November 1, 2024 – November 30, 2024
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
November 1, 2024 – November 30, 2024
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
November 1, 2024 – November 30, 2024
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2024 – September 29, 2025
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2024 – October 22, 2024
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2024 – October 22, 2024
Resolved
Initial, Follow-up, or Routine Source Water M/R
—
Lead and Copper Rule
July 1, 2024 – February 10, 2025
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
January 1, 2024 – January 31, 2024
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
January 1, 2024 – January 31, 2024
Resolved
Initial, Follow-up, or Routine Source Water M/R
—
Lead and Copper Rule
January 1, 2024 – March 8, 2024
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
January 1, 2024 – January 31, 2024
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
December 1, 2023 – December 31, 2023
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
December 1, 2023 – December 31, 2023
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
December 1, 2023 – December 31, 2023
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2023 – April 10, 2024
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
September 1, 2023 – September 30, 2023
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
September 1, 2023 – September 30, 2023
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
September 1, 2023 – September 30, 2023
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
August 1, 2023 – August 31, 2023
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
August 1, 2023 – August 31, 2023
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
August 1, 2023 – August 31, 2023
Resolved
Initial, Follow-up, or Routine Source Water M/R
—
Lead and Copper Rule
July 1, 2023 – March 8, 2024
Resolved
Initial, Follow-up, or Routine Source Water M/R
—
Lead and Copper Rule
July 1, 2023 – November 9, 2023
Resolved
Initial, Follow-up, or Routine Source Water M/R
—
Lead and Copper Rule
July 1, 2023 – March 8, 2024
Resolved
Initial, Follow-up, or Routine Source Water M/R
—
Lead and Copper Rule
July 1, 2023 – November 9, 2023
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2023 – April 10, 2024
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
May 1, 2023 – May 31, 2023
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
May 1, 2023 – May 31, 2023
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
May 1, 2023 – May 31, 2023
Resolved
Initial, Follow-up, or Routine Source Water M/R
—
Lead and Copper Rule
January 1, 2023 – July 10, 2023
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
October 1, 2020 – October 31, 2020
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
October 1, 2020 – October 31, 2020
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
October 1, 2020 – October 31, 2020
Resolved
Initial, Follow-up, or Routine Source Water M/R
—
Lead and Copper Rule
July 1, 2020 – December 4, 2020
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
February 1, 2019 – February 28, 2019
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
February 1, 2019 – February 28, 2019
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
February 1, 2019 – February 28, 2019
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2018 – July 17, 2019
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
June 1, 2018 – June 30, 2018
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
June 1, 2018 – June 30, 2018
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
June 1, 2018 – June 30, 2018
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
March 11, 2018 – March 15, 2018
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
December 1, 2017 – December 31, 2017
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
April 1, 2014 – June 30, 2014
Resolved
Monitoring and Reporting (DBP)
—
TTHM
April 1, 2014 – June 30, 2014
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
September 1, 2012 – September 30, 2012
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
May 1, 2010 – May 31, 2010
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 2010 – January 31, 2010
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
October 1, 2009 – October 31, 2009
Resolved
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
September 1, 2009 – September 30, 2009
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Benzene
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Toluene
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Styrene
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2008 – December 31, 2008
Resolved
Monitoring, Regular
—
Styrene
January 1, 2008 – December 31, 2008
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2008 – December 31, 2008
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2008 – December 31, 2008
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2008 – December 31, 2008
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2008 – December 31, 2008
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2008 – December 31, 2008
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2008 – December 31, 2008
Resolved
Monitoring, Regular
—
Benzene
January 1, 2008 – December 31, 2008
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 2007 – July 31, 2007
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Toluene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Benzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 2004 – July 31, 2004
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2004 – August 12, 2010
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 19, 2003 – August 12, 2010
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2003 – December 31, 2003
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 19, 2002 – August 12, 2010
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
June 1, 2002 – June 30, 2002
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 30, 2001 – May 1, 2002
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2001 – December 31, 2001
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
January 1, 1996 – January 31, 1996
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
September 1, 1995 – September 30, 1995
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
August 1, 1995 – August 31, 1995
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
July 1, 1995 – July 31, 1995
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
June 1, 1995 – June 30, 1995
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
May 1, 1995 – May 31, 1995
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
April 1, 1995 – April 30, 1995
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
July 1, 1994 – May 1, 2002
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
January 1, 1994 – May 1, 2002
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
January 1, 1992 – June 15, 1995
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
June 1, 1976 – May 31, 1980
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
June 1, 1976 – May 31, 1980
Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
August 1, 2025 – August 31, 2025	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
August 1, 2025 – August 31, 2025	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
August 1, 2025 – August 31, 2025	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
July 1, 2025 – September 19, 2025	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2025 – October 1, 2025	Initial, Follow-up, or Routine Source Water M/R	Lead and Copper Rule	—	Resolved
April 1, 2025 – April 30, 2025	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
April 1, 2025 – April 30, 2025	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
April 1, 2025 – April 30, 2025	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
February 1, 2025 – February 28, 2025	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
February 1, 2025 – February 28, 2025	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
February 1, 2025 – February 28, 2025	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
February 1, 2025 – February 28, 2025	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
January 1, 2025 – December 31, 2025	Monitoring and Reporting (DBP)	TTHM	—	Archived
January 1, 2025 – March 31, 2025	Initial, Follow-up, or Routine Source Water M/R	Lead and Copper Rule	—	Resolved
January 1, 2025 – June 3, 2025	Initial, Follow-up, or Routine Source Water M/R	Lead and Copper Rule	—	Resolved
January 1, 2025 – December 31, 2025	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Archived
December 1, 2024 – December 31, 2024	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
December 1, 2024 – December 31, 2024	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
December 1, 2024 – December 31, 2024	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
November 1, 2024 – November 30, 2024	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
November 1, 2024 – November 30, 2024	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
November 1, 2024 – November 30, 2024	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
October 1, 2024 – September 29, 2025	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
October 1, 2024 – October 22, 2024	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2024 – October 22, 2024	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2024 – February 10, 2025	Initial, Follow-up, or Routine Source Water M/R	Lead and Copper Rule	—	Resolved
January 1, 2024 – January 31, 2024	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
January 1, 2024 – January 31, 2024	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
January 1, 2024 – March 8, 2024	Initial, Follow-up, or Routine Source Water M/R	Lead and Copper Rule	—	Resolved
January 1, 2024 – January 31, 2024	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
December 1, 2023 – December 31, 2023	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
December 1, 2023 – December 31, 2023	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
December 1, 2023 – December 31, 2023	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
October 1, 2023 – April 10, 2024	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
September 1, 2023 – September 30, 2023	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
September 1, 2023 – September 30, 2023	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
September 1, 2023 – September 30, 2023	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
August 1, 2023 – August 31, 2023	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
August 1, 2023 – August 31, 2023	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
August 1, 2023 – August 31, 2023	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
July 1, 2023 – March 8, 2024	Initial, Follow-up, or Routine Source Water M/R	Lead and Copper Rule	—	Resolved
July 1, 2023 – November 9, 2023	Initial, Follow-up, or Routine Source Water M/R	Lead and Copper Rule	—	Resolved
July 1, 2023 – March 8, 2024	Initial, Follow-up, or Routine Source Water M/R	Lead and Copper Rule	—	Resolved
July 1, 2023 – November 9, 2023	Initial, Follow-up, or Routine Source Water M/R	Lead and Copper Rule	—	Resolved
July 1, 2023 – April 10, 2024	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
May 1, 2023 – May 31, 2023	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
May 1, 2023 – May 31, 2023	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
May 1, 2023 – May 31, 2023	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
January 1, 2023 – July 10, 2023	Initial, Follow-up, or Routine Source Water M/R	Lead and Copper Rule	—	Resolved
October 1, 2020 – October 31, 2020	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
October 1, 2020 – October 31, 2020	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
October 1, 2020 – October 31, 2020	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
July 1, 2020 – December 4, 2020	Initial, Follow-up, or Routine Source Water M/R	Lead and Copper Rule	—	Resolved
February 1, 2019 – February 28, 2019	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
February 1, 2019 – February 28, 2019	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
February 1, 2019 – February 28, 2019	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
October 1, 2018 – July 17, 2019	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
June 1, 2018 – June 30, 2018	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
June 1, 2018 – June 30, 2018	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
June 1, 2018 – June 30, 2018	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
March 11, 2018 – March 15, 2018	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
December 1, 2017 – December 31, 2017	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
April 1, 2014 – June 30, 2014	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
April 1, 2014 – June 30, 2014	Monitoring and Reporting (DBP)	TTHM	—	Resolved
September 1, 2012 – September 30, 2012	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
January 1, 2012 – December 31, 2012	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2012 – December 31, 2012	Monitoring, Regular	Arsenic	—	Resolved
May 1, 2010 – May 31, 2010	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 2010 – January 31, 2010	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 1, 2009 – October 31, 2009	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
September 1, 2009 – September 30, 2009	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	Benzene	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	Toluene	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	Styrene	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	Styrene	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	Benzene	—	Resolved
July 1, 2007 – July 31, 2007	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Toluene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Benzene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Nitrate	—	Resolved
July 1, 2004 – July 31, 2004	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2004 – August 12, 2010	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
October 19, 2003 – August 12, 2010	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
January 1, 2003 – December 31, 2003	Monitoring, Regular	Nitrate	—	Resolved
October 19, 2002 – August 12, 2010	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
June 1, 2002 – June 30, 2002	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
July 30, 2001 – May 1, 2002	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2001 – December 31, 2001	Monitoring, Regular	Nitrate	—	Resolved
January 1, 1996 – January 31, 1996	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
September 1, 1995 – September 30, 1995	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
August 1, 1995 – August 31, 1995	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
July 1, 1995 – July 31, 1995	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
June 1, 1995 – June 30, 1995	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
May 1, 1995 – May 31, 1995	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
April 1, 1995 – April 30, 1995	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
July 1, 1994 – May 1, 2002	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
January 1, 1994 – May 1, 2002	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
January 1, 1992 – June 15, 1995	Failure to Filter (SWTR)	Surface Water Treatment Rule	Health-based	Resolved
June 1, 1976 – May 31, 1980	Monitoring, Regular	Combined Radium (-226 and -228)	—	Archived
June 1, 1976 – May 31, 1980	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

October 1, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
October 1, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
September 29, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
June 3, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
June 3, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
March 31, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
March 31, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
March 25, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
February 10, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
February 10, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
February 10, 2025State Compliance achievedgeneral compliance action — not tied to a specific violation on record
October 22, 2024State Compliance achievedgeneral compliance action — not tied to a specific violation on record
October 22, 2024State Compliance achievedgeneral compliance action — not tied to a specific violation on record
April 10, 2024State Compliance achievedgeneral compliance action — not tied to a specific violation on record
March 8, 2024State Compliance achievedgeneral compliance action — not tied to a specific violation on record
March 8, 2024State Compliance achievedgeneral compliance action — not tied to a specific violation on record
March 8, 2024State Compliance achievedgeneral compliance action — not tied to a specific violation on record
November 9, 2023State Compliance achievedgeneral compliance action — not tied to a specific violation on record
November 9, 2023State Compliance achievedgeneral compliance action — not tied to a specific violation on record
July 10, 2023State Compliance achievedgeneral compliance action — not tied to a specific violation on record
July 10, 2023State Compliance achievedgeneral compliance action — not tied to a specific violation on record
December 4, 2020State Compliance achievedgeneral compliance action — not tied to a specific violation on record
December 4, 2020State Compliance achievedgeneral compliance action — not tied to a specific violation on record
September 10, 2020State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
July 17, 2019State Compliance achievedgeneral compliance action — not tied to a specific violation on record
April 5, 2019State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 6, 2018State Compliance achievedgeneral compliance action — not tied to a specific violation on record
May 3, 2018State Compliance achievedgeneral compliance action — not tied to a specific violation on record
March 15, 2018State Compliance achievedgeneral compliance action — not tied to a specific violation on record
March 15, 2018State Compliance achievedgeneral compliance action — not tied to a specific violation on record
March 15, 2018State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
January 29, 2018State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
September 24, 2014State Compliance achievedgeneral compliance action — not tied to a specific violation on record
March 4, 2013State Compliance achievedgeneral compliance action — not tied to a specific violation on record
February 21, 2013State Compliance achievedgeneral compliance action — not tied to a specific violation on record
February 14, 2013State Compliance achievedgeneral compliance action — not tied to a specific violation on record
February 4, 2013State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
December 3, 2012State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
October 29, 2012State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
October 25, 2012State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
December 8, 2010State Compliance achievedgeneral compliance action — not tied to a specific violation on record
December 8, 2010State Compliance achievedgeneral compliance action — not tied to a specific violation on record
December 8, 2010State Compliance achievedgeneral compliance action — not tied to a specific violation on record
December 8, 2010State Compliance achievedgeneral compliance action — not tied to a specific violation on record
December 8, 2010State Compliance achievedgeneral compliance action — not tied to a specific violation on record
December 8, 2010State Compliance achievedgeneral compliance action — not tied to a specific violation on record
December 8, 2010State Compliance achievedgeneral compliance action — not tied to a specific violation on record
December 8, 2010State Compliance achievedgeneral compliance action — not tied to a specific violation on record
December 8, 2010State Compliance achievedgeneral compliance action — not tied to a specific violation on record
December 8, 2010State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 12, 2010Federal Compliance achieved4 linked violations
June 21, 2010State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
March 22, 2010State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
February 22, 2010State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
October 19, 2009State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
June 23, 2009State Compliance achievedgeneral compliance action — not tied to a specific violation on record
June 23, 2009State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 27, 2007State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 27, 2007State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 27, 2007State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 27, 2007State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 27, 2007State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 27, 2007State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 27, 2007State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 27, 2007State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 27, 2007State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 27, 2007State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 27, 2007State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 27, 2007State Compliance achievedgeneral compliance action — not tied to a specific violation on record
January 1, 2007State Compliance achieved996 linked violations
January 25, 2005State Compliance achievedgeneral compliance action — not tied to a specific violation on record
May 1, 2002State Compliance achievedgeneral compliance action — not tied to a specific violation on record
January 19, 2001State Compliance achievedgeneral compliance action — not tied to a specific violation on record
May 25, 2000State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 23, 1999State Administrative/Compliance Order with penalty issuedgeneral compliance action — not tied to a specific violation on record
March 20, 1998State Administrative/Compliance Order with penalty issuedgeneral compliance action — not tied to a specific violation on record
February 20, 1997State Compliance achievedgeneral compliance action — not tied to a specific violation on record
April 1, 1996State Administrative/Compliance Order with penalty issuedgeneral compliance action — not tied to a specific violation on record
November 15, 1994State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
November 4, 1994State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record

Contact

LYONS MEHAMA WATER DISTRICT

503-859-2367

LYONS, OR 97358