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SIX ACRES WATER COMPANY

PWS ID: CA4900608 · SAN FRANCISCO, California 94133

SIX ACRES WATER COMPANY serves 66 people in SAN FRANCISCO, California using Surface Water water sources. It has 103 recorded EPA violations, including 7 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: SIX ACRES WATER COMPANY

SIX ACRES WATER COMPANY is a private-owned community water system that delivers drinking water to 66 residents in SAN FRANCISCO, California (Sonoma County) through 22 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 103 total violations for this system , of which 7 (7%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 90 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 13 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across California, EPA tracks 7,249 public water systems serving 42,404,883 people, with 153,308 cumulative violations and 63,983 health-based violations on record. About 89% of systems in the state carry at least one violation, and state-wide the average per system is 21.1 violations. SIX ACRES WATER COMPANY's 103 violations sit above the California average. Statewide, 447 of 694 UCMR5-tested systems have reported PFAS detections (64.4%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
66
Total Violations
103
Health-Based Violations
7
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
22
County
Sonoma
School/Daycare
No
MCL Violations
0
Monitoring Violations
90
Treatment Tech Violations
7

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 13 2015
Nitrate MR 6 2021
Groundwater Rule TT 6 2024
Atrazine MR 4 2014
Nitrite MR 2 2014
1,2,4-Trichlorobenzene MR 2 2014
cis-1,2-Dichloroethylene MR 2 2014
o-Dichlorobenzene MR 2 2014
1,1-Dichloroethylene MR 2 2014
trans-1,2-Dichloroethylene MR 2 2014
1,2-Dichloroethane MR 2 2014
Carbon tetrachloride MR 2 2014
1,2-Dichloropropane MR 2 2014
1,1,2-Trichloroethane MR 2 2014
Tetrachloroethylene MR 2 2014
Toluene MR 2 2014
Ethylbenzene MR 2 2014
Carbofuran MR 2 2014
Dalapon MR 2 2014
Dinoseb MR 2 2014
Gross Alpha, Excl. Radon and U MR 2 1981
Pentachlorophenol MR 2 2014
Picloram MR 2 2014
Trichloroethylene MR 2 2014
Styrene MR 2 2014
DICHLOROMETHANE MR 2 2014
CHLOROBENZENE MR 2 2014
Benzene MR 2 2014
Endothall MR 2 2014
1,1,1-Trichloroethane MR 2 2014

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records — or to file a complaint, request a Consumer Confidence Report, or check current monitoring status — go directly to the federal and state regulators that enforce the Safe Drinking Water Act for SIX ACRES WATER COMPANY.

Federal Source of Truth

EPA SDWIS — Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID CA4900608 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

California Drinking Water Authority

California State Water Resources Control Board — Division of Drinking Water is the primacy agency that licenses and inspects SIX ACRES WATER COMPANY under EPA-delegated authority.

Open CA regulator portal

Source: California State Water Resources Control Board — Division of Drinking Water

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2024 Groundwater Rule TT 6 SDWIS / CA4900608 / 0700
2021 Nitrate MR 6 SDWIS / CA4900608 / 1040
2020 Surface Water Treatment Rule TT 1 SDWIS / CA4900608 / 0200
2015 Coliform (TCR) MR 13 SDWIS / CA4900608 / 3100
2014 Atrazine MR 4 SDWIS / CA4900608 / 2050
2014 Nitrite MR 2 SDWIS / CA4900608 / 1041
2014 1,2,4-Trichlorobenzene MR 2 SDWIS / CA4900608 / 2378
2014 cis-1,2-Dichloroethylene MR 2 SDWIS / CA4900608 / 2380
2014 o-Dichlorobenzene MR 2 SDWIS / CA4900608 / 2968
2014 1,1-Dichloroethylene MR 2 SDWIS / CA4900608 / 2977
2014 trans-1,2-Dichloroethylene MR 2 SDWIS / CA4900608 / 2979
2014 1,2-Dichloroethane MR 2 SDWIS / CA4900608 / 2980
2014 Carbon tetrachloride MR 2 SDWIS / CA4900608 / 2982
2014 1,2-Dichloropropane MR 2 SDWIS / CA4900608 / 2983
2014 1,1,2-Trichloroethane MR 2 SDWIS / CA4900608 / 2985

How SIX ACRES WATER COMPANY Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric SIX ACRES WATER COMPANY California avg Federal benchmark
Total violations 103 21.1 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 7 8.8 Indicates a contaminant exceeded a federal MCL
PFAS detection None 64.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 66 5,850 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 7,249 regulated public water systems in California.

Federal MCL reference — Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is SIX ACRES WATER COMPANY water safe to drink? ▼
SIX ACRES WATER COMPANY (PWS ID: CA4900608) has 103 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 66 people using Surface Water sources.
How many people does SIX ACRES WATER COMPANY serve? ▼
SIX ACRES WATER COMPANY serves 66 people in SAN FRANCISCO, California. It is a Private-owned system using Surface Water water sources with 22 service connections.
What type of violations does SIX ACRES WATER COMPANY have? ▼
SIX ACRES WATER COMPANY has 103 total violations: 7 health-based violations (MCL exceedances or treatment failures), 90 monitoring/reporting violations, and 7 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in SIX ACRES WATER COMPANY water? ▼
No PFAS testing data is available for SIX ACRES WATER COMPANY under the EPA's UCMR5 monitoring program.
What water source does SIX ACRES WATER COMPANY use? ▼
SIX ACRES WATER COMPANY uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology — how this data is sourced, computed, and verified.

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