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Bear River/Singley Hill

California — Community Water System — PWSID: 090605125

System Information

PWSID090605125
System NameBear River/Singley Hill
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeNative American
EPA Region09
Serves SchoolNo
WholesalerNo
First ReportedAug 2, 1994
Last ReportedDec 31, 2025

Location & Contact

StateCalifornia
CityLoleta
ZIP Code95551
Address266 Keisner Road
OrganizationBear River Band of the Rohnerville Rancheria
Phone7077331900

Population & Service

Population Served1,530
Service Connections13

Drinking Water Violations (181)

This water system has 181 violations recorded in the EPA SDWIS database.

Begin Date End Date Contaminant Category Health-Based Major Measured Federal MCL State MCL Status Return to Compliance Rule
Jul 1, 2025 Sep 30, 2025 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 23, 2025 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2024 Dec 31, 2024 Bromate MR No Yes — 0.010 mg/L — Resolved Dec 31, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2024 Dec 31, 2024 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2024 Dec 31, 2024 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2024 Dec 31, 2024 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2024 Dec 31, 2024 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2024 Nitrate Rule
Jan 1, 2024 — Lead and Copper Rule MR No No — TT — Resolved Apr 3, 2025 Lead and Copper Rule
Jan 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Apr 18, 2024 Lead and Copper Rule
Jan 1, 2021 Dec 31, 2023 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2021 Dec 31, 2023 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2017 Dec 31, 2019 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2017 Dec 31, 2019 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2017 — Lead and Copper Rule MR No No — TT — Resolved Oct 19, 2020 Lead and Copper Rule
Jul 1, 2009 Jul 31, 2009 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 2009 Total Coliform Rule
Mar 1, 2007 Mar 31, 2007 Coliform (TCR) MR No No — 5% of samples — Resolved Mar 31, 2007 Total Coliform Rule
Jan 1, 2007 Jan 31, 2007 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Jan 31, 2007 Total Coliform Rule
Jan 1, 2005 Dec 31, 2005 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2005 Nitrate Rule
Jan 1, 2004 Dec 31, 2004 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2004 Nitrate Rule
Oct 1, 2002 Oct 31, 2002 Coliform (TCR) MR No No — 5% of samples — Resolved Oct 31, 2002 Total Coliform Rule
Sep 1, 2002 Sep 30, 2002 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2002 Total Coliform Rule
Jun 1, 2002 Jun 30, 2002 Coliform (TCR) MR No No — 5% of samples — Resolved Jun 30, 2002 Total Coliform Rule
Jan 1, 2002 Dec 31, 2002 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2002 Nitrate Rule
Jan 1, 2002 — Lead and Copper Rule MR No No — TT — Resolved Feb 4, 2005 Lead and Copper Rule
Jan 1, 2001 Dec 31, 2001 ETHYLENE DIBROMIDE MR No Yes — 0.00005 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 Endrin MR No Yes — 0.002 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 Glyphosate MR No Yes — 0.7 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 Dalapon MR No Yes — 0.2 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 Methoxychlor MR No Yes — 0.04 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 Simazine MR No Yes — 0.004 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 Toxaphene MR No Yes — 0.003 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 Diquat MR No Yes — 0.02 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 Heptachlor MR No Yes — 0.0004 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2001 Nitrate Rule
Jan 1, 2001 Dec 31, 2001 Di(2-ethylhexyl) adipate MR No Yes — 0.4 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 Atrazine MR No Yes — 0.003 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 Total Polychlorinated Biphenyls (PCB) MR No Yes — 0.0005 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 1,2-DIBROMO-3-CHLOROPROPANE MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 Chlordane MR No Yes — 0.002 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 Benzo(a)pyrene MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 LASSO MR No Yes — — — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 2,4-D MR No Yes — 0.07 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 OXAMYL MR No Yes — 0.2 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 Carbofuran MR No Yes — 0.04 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 Hexachlorocyclopentadiene MR No Yes — 0.05 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 Dinoseb MR No Yes — 0.007 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 Endothall MR No Yes — 0.1 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Jan 1, 2001 Dec 31, 2001 Pentachlorophenol MR No Yes — 0.001 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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