IRVINE, CA · Santa Cruz County

BIG BASIN WATER COMPANY 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 California’s official records. Always confirm current status with California before making decisions based on this information.

System facts

System ID (PWSID): CA4410001
System type: Community Water System
Population served: 1,120
Service connections: 540
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
June 1, 2022 – June 30, 2022
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2022 – March 31, 2022
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2022 – March 31, 2022
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
October 1, 2021 – December 31, 2021
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
July 1, 2021 – September 30, 2021
Resolved
Monitoring and Reporting (DBP)
—
TTHM
July 1, 2021 – September 30, 2021
Resolved
Monitoring and Reporting (DBP)
—
TTHM
April 1, 2021 – June 30, 2021
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
April 1, 2021 – June 30, 2021
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2021 – March 31, 2021
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2021 – March 31, 2021
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
October 1, 2020 – December 31, 2020
Resolved
Monitoring and Reporting (DBP)
—
TTHM
October 1, 2020 – December 31, 2020
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
July 1, 2020 – September 30, 2020
Resolved
Monitoring and Reporting (DBP)
—
TTHM
July 1, 2020 – September 30, 2020
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2018 – December 31, 2020
Resolved
Monitoring, Regular
—
Nitrite
January 1, 2018 – December 31, 2020
Resolved
Monitoring, Regular
—
Simazine
January 1, 2018 – December 31, 2020
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2018 – December 31, 2018
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
February 1, 2005 – February 28, 2005
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
January 1, 2005 – January 31, 2005
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2005 – March 31, 2005
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
June 1, 2004 – June 30, 2004
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
May 1, 2004 – May 31, 2004
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
April 1, 2004 – April 30, 2004
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
March 1, 2004 – March 31, 2004
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
February 1, 2004 – February 29, 2004
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
January 1, 2004 – January 31, 2004
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
May 1, 2003 – May 31, 2003
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
April 1, 2003 – April 30, 2003
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
March 1, 2003 – March 31, 2003
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
January 1, 2003 – January 31, 2003
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
December 1, 2002 – December 31, 2002
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
November 1, 2002 – November 30, 2002
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
September 1, 2002 – September 30, 2002
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
June 1, 2002 – June 30, 2002
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
May 1, 2002 – May 31, 2002
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
February 1, 2002 – February 28, 2002
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
June 1, 2022 – June 30, 2022	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2022 – March 31, 2022	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2022 – March 31, 2022	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
October 1, 2021 – December 31, 2021	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2021 – September 30, 2021	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
July 1, 2021 – September 30, 2021	Monitoring and Reporting (DBP)	TTHM	—	Resolved
April 1, 2021 – June 30, 2021	Monitoring and Reporting (DBP)	TTHM	—	Resolved
April 1, 2021 – June 30, 2021	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2021 – March 31, 2021	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2021 – March 31, 2021	Monitoring and Reporting (DBP)	TTHM	—	Resolved
October 1, 2020 – December 31, 2020	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
October 1, 2020 – December 31, 2020	Monitoring and Reporting (DBP)	TTHM	—	Resolved
July 1, 2020 – September 30, 2020	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
July 1, 2020 – September 30, 2020	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2018 – December 31, 2020	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2018 – December 31, 2020	Monitoring, Regular	Nitrite	—	Resolved
January 1, 2018 – December 31, 2020	Monitoring, Regular	Simazine	—	Resolved
January 1, 2018 – December 31, 2018	Monitoring, Regular	Nitrate	—	Resolved
February 1, 2005 – February 28, 2005	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
January 1, 2005 – January 31, 2005	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
January 1, 2005 – March 31, 2005	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
June 1, 2004 – June 30, 2004	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
May 1, 2004 – May 31, 2004	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
April 1, 2004 – April 30, 2004	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
March 1, 2004 – March 31, 2004	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
February 1, 2004 – February 29, 2004	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
January 1, 2004 – January 31, 2004	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
May 1, 2003 – May 31, 2003	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
April 1, 2003 – April 30, 2003	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
March 1, 2003 – March 31, 2003	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
January 1, 2003 – January 31, 2003	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
December 1, 2002 – December 31, 2002	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
November 1, 2002 – November 30, 2002	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
September 1, 2002 – September 30, 2002	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
June 1, 2002 – June 30, 2002	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
May 1, 2002 – May 31, 2002	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
February 1, 2002 – February 28, 2002	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

November 10, 2022State Compliance achieved8 linked violations
December 20, 2021State Compliance achieved10 linked violations
April 9, 2021State Administrative/Compliance Order without penalty issued1 linked violation
June 30, 2005State Compliance achieved30 linked violations
May 27, 2004State Violation/Reminder Notice4 linked violations
May 27, 2004State Compliance achieved6 linked violations

Contact

FARJEAT, RENE

949-281-6542

IRVINE, CA 92606