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AGATE BAY WATER COMPANY

PWS ID: CA3110012 · CARNELIAN BAY, California 96140

AGATE BAY WATER COMPANY serves 2,500 people in CARNELIAN BAY, California using Surface Water water sources. It has 94 recorded EPA violations, including 18 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: AGATE BAY WATER COMPANY

AGATE BAY WATER COMPANY is a private-owned community water system that delivers drinking water to 2,500 residents in CARNELIAN BAY, California (Placer County) through 584 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 94 total violations for this system , of which 18 (19%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 74 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 (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. AGATE BAY WATER COMPANY's 94 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
2,500
Total Violations
94
Health-Based Violations
18
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
584
County
Placer
School/Daycare
No
MCL Violations
13
Monitoring Violations
74
Treatment Tech Violations
5

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 13 2012
Lead and Copper Rule MR 6 2023
Surface Water Treatment Rule TT 4 1993
Arsenic MR 2 2013
Chromium MR 2 2013
Fluoride MR 2 2013
Nitrite MR 2 2013
Beryllium, Total MR 2 2013
Selenium MR 2 2013
1,2,4-Trichlorobenzene MR 2 2013
cis-1,2-Dichloroethylene MR 2 2013
Xylenes, Total MR 2 2013
o-Dichlorobenzene MR 2 2013
Vinyl chloride MR 2 2013
1,1-Dichloroethylene MR 2 2013
1,2-Dichloroethane MR 2 2013
Carbon tetrachloride MR 2 2013
1,2-Dichloropropane MR 2 2013
Trichloroethylene MR 2 2013
1,1,2-Trichloroethane MR 2 2013
Tetrachloroethylene MR 2 2013
Styrene MR 2 2013
p-Dichlorobenzene MR 2 2013
Barium MR 2 2013
Surface Water Treatment Rule MR 2 1992
Cadmium MR 2 2013
trans-1,2-Dichloroethylene MR 2 2013
Ethylbenzene MR 2 2013
Nickel MR 2 2013
Antimony, Total MR 2 2013

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 AGATE BAY 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 CA3110012 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 AGATE BAY 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 LEAD AND COPPER RULE REVISIONS RPT 1 SDWIS / CA3110012 / 5200
2024 LEAD AND COPPER RULE REVISIONS TT 1 SDWIS / CA3110012 / 5200
2023 Lead and Copper Rule MR 6 SDWIS / CA3110012 / 5000
2013 Arsenic MR 2 SDWIS / CA3110012 / 1005
2013 Chromium MR 2 SDWIS / CA3110012 / 1020
2013 Fluoride MR 2 SDWIS / CA3110012 / 1025
2013 Nitrite MR 2 SDWIS / CA3110012 / 1041
2013 Beryllium, Total MR 2 SDWIS / CA3110012 / 1075
2013 Selenium MR 2 SDWIS / CA3110012 / 1045
2013 1,2,4-Trichlorobenzene MR 2 SDWIS / CA3110012 / 2378
2013 cis-1,2-Dichloroethylene MR 2 SDWIS / CA3110012 / 2380
2013 Xylenes, Total MR 2 SDWIS / CA3110012 / 2955
2013 o-Dichlorobenzene MR 2 SDWIS / CA3110012 / 2968
2013 Vinyl chloride MR 2 SDWIS / CA3110012 / 2976
2013 1,1-Dichloroethylene MR 2 SDWIS / CA3110012 / 2977

How AGATE BAY WATER COMPANY Compares

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

Metric AGATE BAY WATER COMPANY California avg Federal benchmark
Total violations 94 21.1 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 18 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 2,500 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 AGATE BAY WATER COMPANY water safe to drink? ▼
AGATE BAY WATER COMPANY (PWS ID: CA3110012) has 94 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 2,500 people using Surface Water sources.
How many people does AGATE BAY WATER COMPANY serve? ▼
AGATE BAY WATER COMPANY serves 2,500 people in CARNELIAN BAY, California. It is a Private-owned system using Surface Water water sources with 584 service connections.
What type of violations does AGATE BAY WATER COMPANY have? ▼
AGATE BAY WATER COMPANY has 94 total violations: 18 health-based violations (MCL exceedances or treatment failures), 74 monitoring/reporting violations, and 5 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in AGATE BAY WATER COMPANY water? ▼
No PFAS testing data is available for AGATE BAY WATER COMPANY under the EPA's UCMR5 monitoring program.
What water source does AGATE BAY WATER COMPANY use? ▼
AGATE BAY 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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