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Transient Non-Community Water System · PWS CA0900216

The Pub Water System

Somerset, California 95684 - drinking water served from groundwater sources to 1,000 people, tracked in EPA SDWIS and UCMR5.

1,000
People served
28
EPA violations
12
Health-based
Untested
UCMR5 result

The verdict

EPA records 28 drinking-water violations at The Pub Water System, 43% of them health-based - above the California per-system average.

28
Total EPA violations on record
43%
Health-based (MCL / treatment failure)
1,000
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: The Pub Water System

The Pub Water System is a private-owned transient non-community water system that delivers drinking water to 1,000 residents in Somerset, California (El Dorado County) through 2 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 28 total violations for this system , of which 12 (43%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 15 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 12 violations (MCL, health-based). 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. Statewide, 447 of 694 UCMR5-tested systems have reported PFAS detections (64.4%).

The Pub Water System's 28 violations sit above the California average.

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
1,000
Total Violations
28
Health-Based Violations
12
Water Source
Groundwater

System Details

System Type
Transient Non-Community
Owner Type
Private
Connections
2
County
El Dorado
School/Daycare
No
MCL Violations
12
Monitoring Violations
15
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 12 2010
Coliform (TCR) MR 6 2010
Nitrate MR 5 2018
Revised Total Coliform Rule MON 2 2022
Nitrate-Nitrite MR 2 2020

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 The Pub Water System.

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 CA0900216 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 The Pub Water System 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
2022 Revised Total Coliform Rule MON 2 SDWIS / CA0900216 / 8000
2020 Nitrate-Nitrite MR 2 SDWIS / CA0900216 / 1038
2018 Nitrate MR 5 SDWIS / CA0900216 / 1040
2010 Coliform (TCR) MCL 12 SDWIS / CA0900216 / 3100
2010 Coliform (TCR) MR 6 SDWIS / CA0900216 / 3100

How The Pub Water System Compares

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

Metric The Pub Water System California avg Federal benchmark
Total violations 28 21.1 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 12 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 1,000 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 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is The Pub Water System water safe to drink? ▼
The Pub Water System (PWS ID: CA0900216) has 28 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,000 people using Groundwater sources.
How many people does The Pub Water System serve? ▼
The Pub Water System serves 1,000 people in Somerset, California. It is a Private-owned system using Groundwater water sources with 2 service connections.
What type of violations does The Pub Water System have? ▼
The Pub Water System has 28 total violations: 12 health-based violations (MCL exceedances or treatment failures), 15 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in The Pub Water System water? ▼
No PFAS testing data is available for The Pub Water System under the EPA's UCMR5 monitoring program.
What water source does The Pub Water System use? ▼
The Pub Water System uses Groundwater as its primary water source. It is classified as a Transient Non-Community Water System, serving transient populations.
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.
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.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.