DENVER, PA · Lancaster County

DENVER BORO 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 Pennsylvania’s official records. Always confirm current status with Pennsylvania before making decisions based on this information.

System facts

System ID (PWSID): PA7360017
System type: Community Water System
Population served: 3,861
Service connections: 1,492
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Groundwater Rule
December 1, 2024 – December 31, 2024
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
October 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
October 1, 2023 – December 31, 2023
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
June 1, 2022 – June 30, 2022
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
June 10, 2020 – December 15, 2020
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
April 1, 2020 – December 15, 2020
Resolved
Monitoring and Reporting (DBP)
—
TTHM
October 1, 2017 – December 31, 2017
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
October 1, 2017 – December 31, 2017
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
July 1, 2017 – September 30, 2017
Resolved
Monitoring and Reporting (DBP)
—
TTHM
July 1, 2017 – September 30, 2017
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
October 1, 2016 – December 31, 2016
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
October 1, 2016 – December 31, 2016
Resolved
Monitoring and Reporting (DBP)
—
TTHM
October 1, 2016 – December 31, 2016
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
July 1, 2008 – July 31, 2008
Resolved
Monitoring, Regular
—
Nitrate
July 1, 2006 – September 30, 2006
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
September 1, 2004 – September 30, 2004
Resolved
Monitoring, Regular
—
Nitrate
July 1, 2004 – September 30, 2004
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
March 1, 2004 – March 31, 2004
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
March 1, 2004 – March 31, 2004
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
February 1, 2004 – February 29, 2004
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2004 – March 31, 2004
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
January 1, 2004 – January 31, 2004
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
December 1, 2002 – December 31, 2002
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
November 1, 2002 – November 30, 2002
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
October 1, 2002 – October 31, 2002
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
September 1, 2002 – September 30, 2002
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
August 1, 2002 – August 31, 2002
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
January 1, 1996 – June 27, 1996
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
October 1, 1995 – October 31, 1995
Resolved
Monitoring, Regular
—
Aldicarb sulfone
January 1, 1995 – March 31, 1995
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 1995 – March 31, 1995
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 1995 – March 31, 1995
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 1995 – March 31, 1995
Resolved
Monitoring, Regular
—
LASSO
January 1, 1995 – March 31, 1995
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 1995 – March 31, 1995
Resolved
Monitoring, Regular
—
Pentachlorophenol
January 1, 1995 – March 31, 1995
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
January 1, 1995 – March 31, 1995
Resolved
Monitoring, Regular
—
Aldicarb sulfoxide
January 1, 1995 – March 31, 1995
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Nickel
January 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 1994 – December 31, 1994
Resolved
Monitoring, Regular
—
Beryllium, Total
January 1, 1994 – December 31, 1994
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
May 1, 1992 – May 31, 1992
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
July 1, 1991 – July 31, 1991
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
March 1, 1991 – March 31, 1991
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
December 1, 1990 – December 31, 1990
Archived
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 1990 – March 31, 1990
Archived
Monitoring, Regular
—
Benzene
January 1, 1990 – March 31, 1990
Archived
Monitoring, Regular
—
Carbon tetrachloride
January 1, 1990 – March 31, 1990
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
December 1, 2024 – December 31, 2024	Monitoring of Treatment (SWTR-Unfilt/GWR)	Groundwater Rule	—	Resolved
October 1, 2023 – December 31, 2023	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
October 1, 2023 – December 31, 2023	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
June 1, 2022 – June 30, 2022	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
June 10, 2020 – December 15, 2020	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
April 1, 2020 – December 15, 2020	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
October 1, 2017 – December 31, 2017	Monitoring and Reporting (DBP)	TTHM	—	Resolved
October 1, 2017 – December 31, 2017	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
July 1, 2017 – September 30, 2017	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
July 1, 2017 – September 30, 2017	Monitoring and Reporting (DBP)	TTHM	—	Resolved
October 1, 2016 – December 31, 2016	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
October 1, 2016 – December 31, 2016	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
October 1, 2016 – December 31, 2016	Monitoring and Reporting (DBP)	TTHM	—	Resolved
July 1, 2008 – July 31, 2008	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
July 1, 2006 – September 30, 2006	Monitoring, Regular	Nitrate	—	Resolved
September 1, 2004 – September 30, 2004	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
July 1, 2004 – September 30, 2004	Monitoring, Regular	Nitrate	—	Resolved
March 1, 2004 – March 31, 2004	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
March 1, 2004 – March 31, 2004	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
February 1, 2004 – February 29, 2004	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
January 1, 2004 – March 31, 2004	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2004 – January 31, 2004	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
December 1, 2002 – December 31, 2002	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
November 1, 2002 – November 30, 2002	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
October 1, 2002 – October 31, 2002	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
September 1, 2002 – September 30, 2002	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
August 1, 2002 – August 31, 2002	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 1996 – June 27, 1996	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
October 1, 1995 – October 31, 1995	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
January 1, 1995 – March 31, 1995	Monitoring, Regular	Aldicarb sulfone	—	Resolved
January 1, 1995 – March 31, 1995	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
January 1, 1995 – March 31, 1995	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
January 1, 1995 – March 31, 1995	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
January 1, 1995 – March 31, 1995	Monitoring, Regular	LASSO	—	Resolved
January 1, 1995 – March 31, 1995	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
January 1, 1995 – March 31, 1995	Monitoring, Regular	Pentachlorophenol	—	Resolved
January 1, 1995 – March 31, 1995	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Resolved
January 1, 1995 – March 31, 1995	Monitoring, Regular	Aldicarb sulfoxide	—	Resolved
January 1, 1994 – December 31, 1994	Monitoring, Regular	Thallium, Total	—	Resolved
January 1, 1994 – December 31, 1994	Monitoring, Regular	Nickel	—	Resolved
January 1, 1994 – December 31, 1994	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 1994 – December 31, 1994	Monitoring, Regular	Beryllium, Total	—	Resolved
May 1, 1992 – May 31, 1992	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
July 1, 1991 – July 31, 1991	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
March 1, 1991 – March 31, 1991	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
December 1, 1990 – December 31, 1990	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
January 1, 1990 – March 31, 1990	Monitoring, Regular	1,1-Dichloroethylene	—	Archived
January 1, 1990 – March 31, 1990	Monitoring, Regular	Benzene	—	Archived
January 1, 1990 – March 31, 1990	Monitoring, Regular	Carbon tetrachloride	—	Archived

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

Enforcement actions

January 30, 2025State Violation/Reminder Notice1 linked violation
January 30, 2025State Compliance achieved1 linked violation
April 17, 2024State Compliance achieved2 linked violations
April 17, 2024State Violation/Reminder Notice2 linked violations
April 17, 2024State Public Notification received2 linked violations
February 12, 2024State Violation/Reminder Notice2 linked violations
February 12, 2024State Public Notification requested2 linked violations
August 8, 2022State Compliance achieved1 linked violation
August 8, 2022State Violation/Reminder Notice1 linked violation
December 15, 2020State Compliance achieved2 linked violations
March 12, 2019State Public Notification received1 linked violation
December 18, 2018State Public Notification received1 linked violation
March 6, 2018State Compliance achieved2 linked violations
February 15, 2018State Public Notification requested2 linked violations
February 15, 2018State Formal Notice of Violation issued2 linked violations
February 15, 2018State Violation/Reminder Notice2 linked violations
November 15, 2017State Violation/Reminder Notice2 linked violations
November 15, 2017State Compliance achieved2 linked violations
November 15, 2017State Public Notification requested2 linked violations
March 16, 2017State Compliance achieved1 linked violation
February 22, 2017State Compliance achieved2 linked violations
February 22, 2017State Formal Notice of Violation issued1 linked violation
February 22, 2017State Public Notification requested1 linked violation
February 15, 2017State Violation/Reminder Notice3 linked violations
August 26, 2008State Compliance achieved1 linked violation
June 19, 2007State Violation/Reminder Notice1 linked violation
June 19, 2007State Compliance achieved1 linked violation
October 30, 2006State Violation/Reminder Notice1 linked violation
October 30, 2006State Compliance achieved1 linked violation
February 24, 2006State Compliance achieved1 linked violation
July 7, 2004State Compliance achieved5 linked violations
March 11, 2003State Compliance achieved4 linked violations
December 9, 2002State Compliance achieved2 linked violations
December 9, 2002State Formal Notice of Violation issued2 linked violations
August 10, 1987State Technical Assistance Visitgeneral compliance action — not tied to a specific violation on record

Contact

DENVER BORO

717-336-2831

DENVER, PA 17517