MENDOCINO, CA

Total Incidents:
94
Last Incident:
October 01, 2018

Note: Just because the latest incident is in 2017 or 2018 doesn't mean your water is free of contaminants! There is a considerable lag between when data is collected and when it is published by the EPA.

Contaminants

All Incidents

Water System Type Measure Violation Effects Begin Date
SURFWOOD MUTUAL WATER CORPORATION TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2018-10-01
SURFWOOD MUTUAL WATER CORPORATION Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2018-10-01
SURFWOOD MUTUAL WATER CORPORATION TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2018-07-01
SURFWOOD MUTUAL WATER CORPORATION Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2018-07-01
SURFWOOD MUTUAL WATER CORPORATION Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2018-04-01
SURFWOOD MUTUAL WATER CORPORATION TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2018-04-01
SURFWOOD MUTUAL WATER CORPORATION Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2018-01-01
SURFWOOD MUTUAL WATER CORPORATION TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2018-01-01
SURFWOOD MUTUAL WATER CORPORATION Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2017-10-01
SURFWOOD MUTUAL WATER CORPORATION TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2017-10-01
SURFWOOD MUTUAL WATER CORPORATION Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2017-07-01
SURFWOOD MUTUAL WATER CORPORATION TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2017-07-01
SURFWOOD MUTUAL WATER CORPORATION TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2017-04-01
SURFWOOD MUTUAL WATER CORPORATION Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2017-04-01
SURFWOOD MUTUAL WATER CORPORATION TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2017-01-01
SURFWOOD MUTUAL WATER CORPORATION Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2017-01-01
SURFWOOD MUTUAL WATER CORPORATION Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2016-10-01
CSP-RUSSIAN GULCH STATE PARK TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2016-10-01
CSP-RUSSIAN GULCH STATE PARK TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2016-10-01
SURFWOOD MUTUAL WATER CORPORATION TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2016-10-01
SURFWOOD MUTUAL WATER CORPORATION TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2016-07-01
SURFWOOD MUTUAL WATER CORPORATION Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2016-07-01
SURFWOOD MUTUAL WATER CORPORATION Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2016-04-01
SURFWOOD MUTUAL WATER CORPORATION TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2016-04-01
SURFWOOD MUTUAL WATER CORPORATION TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2016-01-01
SURFWOOD MUTUAL WATER CORPORATION TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2016-01-01
SURFWOOD MUTUAL WATER CORPORATION Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2016-01-01
SURFWOOD MUTUAL WATER CORPORATION TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2016-01-01
SURFWOOD MUTUAL WATER CORPORATION Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2016-01-01
SURFWOOD MUTUAL WATER CORPORATION Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2016-01-01
WILLITS, CITY OF TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2015-10-01
SURFWOOD MUTUAL WATER CORPORATION TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2015-10-01
WILLITS, CITY OF TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2015-10-01
WILLITS, CITY OF TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2015-10-01
WILLITS, CITY OF TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2015-10-01
WILLITS, CITY OF TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2015-07-01
WILLITS, CITY OF TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2015-07-01
SURFWOOD MUTUAL WATER CORPORATION TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2015-07-01
WILLITS, CITY OF TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2015-07-01
WILLITS, CITY OF TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2015-07-01
SURFWOOD MUTUAL WATER CORPORATION Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2015-07-01
WILLITS, CITY OF TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2015-04-01
WILLITS, CITY OF TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2015-04-01
WILLITS, CITY OF TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2015-04-01
SURFWOOD MUTUAL WATER CORPORATION Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2015-04-01
WILLITS, CITY OF TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2015-04-01
SURFWOOD MUTUAL WATER CORPORATION TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2015-04-01
WILLITS, CITY OF TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2015-01-01
SURFWOOD MUTUAL WATER CORPORATION Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2015-01-01
WILLITS, CITY OF TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2015-01-01
SURFWOOD MUTUAL WATER CORPORATION TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2015-01-01
MARIPOSA INSTITUTE Coliform (TCR) MCL, Monthly (TCR) Maximum Contaminant Level Violation Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 2014-12-01
SURFWOOD MUTUAL WATER CORPORATION TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2014-10-01
BROOKTRAILS TOWNSHIP CSD TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2014-10-01
SURFWOOD MUTUAL WATER CORPORATION Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2014-10-01
BROOKTRAILS TOWNSHIP CSD TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2014-10-01
SURFWOOD MUTUAL WATER CORPORATION Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2014-07-01
WENTE SCOUT RESERVATION Coliform (TCR) MCL, Monthly (TCR) Maximum Contaminant Level Violation Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 2014-04-01
WILLITS, CITY OF Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2013-07-01
WILLITS, CITY OF Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2013-07-01
CSP-RUSSIAN GULCH STATE PARK TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2013-07-01
CSP-RUSSIAN GULCH STATE PARK TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2013-07-01
CSP-RUSSIAN GULCH STATE PARK TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2013-04-01
CSP-RUSSIAN GULCH STATE PARK TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2013-04-01
WILLITS, CITY OF Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2013-04-01
WILLITS, CITY OF Total Haloacetic Acids (HAA5) MCL, Average Maximum Contaminant Level Violation Increased risk of cancer 2013-04-01
CSP-RUSSIAN GULCH STATE PARK TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2013-01-01
CSP-RUSSIAN GULCH STATE PARK TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2013-01-01
CASPAR BEACH RV PARK Coliform (TCR) MCL, Monthly (TCR) Maximum Contaminant Level Violation Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 2012-11-01
CSP-RUSSIAN GULCH STATE PARK TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2012-10-01
CASPAR BEACH RV PARK Coliform (TCR) MCL, Monthly (TCR) Maximum Contaminant Level Violation Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 2012-10-01
CSP-RUSSIAN GULCH STATE PARK TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2012-10-01
CSP-RUSSIAN GULCH STATE PARK TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2012-07-01
CSP-RUSSIAN GULCH STATE PARK TTHM MCL, Average Maximum Contaminant Level Violation Liver, kidney or central nervous system problems; increased risk of cancer 2012-07-01
ORR SPRINGS RESORT Coliform (TCR) MCL, Monthly (TCR) Maximum Contaminant Level Violation Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 2012-05-01
WILDWOOD CAMPGROUND Coliform (TCR) MCL, Monthly (TCR) Maximum Contaminant Level Violation Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 2012-02-01
RIDGEWOOD WATER SYSTEM Coliform (TCR) MCL, Monthly (TCR) Maximum Contaminant Level Violation Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 2012-01-01
WILDWOOD CAMPGROUND Coliform (TCR) MCL, Monthly (TCR) Maximum Contaminant Level Violation Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 2011-12-01
ROUND VALLEY ELEMENTARY SCHOOL Coliform (TCR) MCL, Monthly (TCR) Maximum Contaminant Level Violation Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 2011-10-01
WENTE SCOUT RESERVATION Coliform (TCR) MCL, Monthly (TCR) Maximum Contaminant Level Violation Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 2011-07-01
CITY OF 10,000 BUDDHAS Coliform (TCR) MCL, Monthly (TCR) Maximum Contaminant Level Violation Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present5 2009-04-01
LAYTONVILLE COUNTY WATER DISTRICT Arsenic MCL, Average Maximum Contaminant Level Violation Skin damage or problems with circulatory systems, and may have increased risk of getting cancer 2009-01-01
LAYTONVILLE COUNTY WATER DISTRICT Arsenic MCL, Average Maximum Contaminant Level Violation Skin damage or problems with circulatory systems, and may have increased risk of getting cancer 2008-10-01
LAYTONVILLE COUNTY WATER DISTRICT Arsenic MCL, Average Maximum Contaminant Level Violation Skin damage or problems with circulatory systems, and may have increased risk of getting cancer 2008-07-01
LAYTONVILLE COUNTY WATER DISTRICT Arsenic MCL, Average Maximum Contaminant Level Violation Skin damage or problems with circulatory systems, and may have increased risk of getting cancer 2008-04-01
LAYTONVILLE COUNTY WATER DISTRICT Arsenic MCL, Average Maximum Contaminant Level Violation Skin damage or problems with circulatory systems, and may have increased risk of getting cancer 2008-01-01
LAYTONVILLE COUNTY WATER DISTRICT Arsenic MCL, Average Maximum Contaminant Level Violation Skin damage or problems with circulatory systems, and may have increased risk of getting cancer 2007-10-01
LAYTONVILLE COUNTY WATER DISTRICT Arsenic MCL, Average Maximum Contaminant Level Violation Skin damage or problems with circulatory systems, and may have increased risk of getting cancer 2007-07-01
LAYTONVILLE COUNTY WATER DISTRICT Arsenic MCL, Average Maximum Contaminant Level Violation Skin damage or problems with circulatory systems, and may have increased risk of getting cancer 2007-04-01
LAYTONVILLE COUNTY WATER DISTRICT Arsenic MCL, Average Maximum Contaminant Level Violation Skin damage or problems with circulatory systems, and may have increased risk of getting cancer 2007-01-01
LAYTONVILLE COUNTY WATER DISTRICT Arsenic MCL, Average Maximum Contaminant Level Violation Skin damage or problems with circulatory systems, and may have increased risk of getting cancer 2006-10-01
LAYTONVILLE COUNTY WATER DISTRICT Arsenic MCL, Average Maximum Contaminant Level Violation Skin damage or problems with circulatory systems, and may have increased risk of getting cancer 2006-07-01
LAYTONVILLE COUNTY WATER DISTRICT Arsenic MCL, Average Maximum Contaminant Level Violation Skin damage or problems with circulatory systems, and may have increased risk of getting cancer 2006-04-01
LAYTONVILLE COUNTY WATER DISTRICT Arsenic MCL, Average Maximum Contaminant Level Violation Skin damage or problems with circulatory systems, and may have increased risk of getting cancer 2006-01-01