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CAL AM - OAKHURST

PWS ID: CA2010007 · SACRAMENTO, California 95838

CAL AM - OAKHURST serves 3,693 people in SACRAMENTO, California using Groundwater water sources. It has 231 recorded EPA violations, including 221 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (1 compound found).

Water Quality Snapshot: CAL AM - OAKHURST

CAL AM - OAKHURST is a private-owned community water system that delivers drinking water to 3,693 residents in SACRAMENTO, California (Madera County) through 1,119 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 231 total violations for this system , of which 221 (96%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 6 monitoring and reporting violations are on file. The most recent violation on record dates to 2019.

The most frequently cited contaminant at this system is Arsenic, recorded in 123 violations (MCL, health-based). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 474 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

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. CAL AM - OAKHURST's 231 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.

PFAS Detected

1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
3,693
Total Violations
231
Health-Based Violations
221
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
1,119
County
Madera
School/Daycare
No
MCL Violations
221
Monitoring Violations
6
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MCL 123 2019
Combined Uranium MCL 94 2019
Coliform (TCR) MCL 4 1998
Lead and Copper Rule MR 2 2007
Nitrate MR 2 2003
Coliform (TCR) MR 2 2008

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 8 of 240 samples detected PFAS.

Contaminant Date Result MRL Status
6:2 FTS 9/13/2023 <0.005 µg/L 0.005 µg/L Not Detected
11Cl-PF3OUdS 9/13/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 9/13/2023 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 9/13/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 9/13/2023 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 9/13/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 9/13/2023 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 9/13/2023 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 9/13/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFOS 9/13/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFBS 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 9/13/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 9/13/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 9/13/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFHxS 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 9/13/2023 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 9/13/2023 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 9/13/2023 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 9/13/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 9/13/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFHpA 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 9/13/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFOA 9/13/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 9/13/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 9/13/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 9/13/2023 <0.004 µg/L 0.004 µg/L Not Detected
6:2 FTS 9/13/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 9/13/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 9/13/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 9/13/2023 <0.004 µg/L 0.004 µg/L Not Detected

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 CAL AM - OAKHURST.

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 CA2010007 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 CAL AM - OAKHURST 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
2019 Arsenic MCL 123 SDWIS / CA2010007 / 1005
2019 Combined Uranium MCL 94 SDWIS / CA2010007 / 4006
2008 Coliform (TCR) MR 2 SDWIS / CA2010007 / 3100
2007 Lead and Copper Rule MR 2 SDWIS / CA2010007 / 5000
2003 Nitrate MR 2 SDWIS / CA2010007 / 1040
1998 Coliform (TCR) MCL 4 SDWIS / CA2010007 / 3100

How CAL AM - OAKHURST Compares

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

Metric CAL AM - OAKHURST California avg Federal benchmark
Total violations 231 21.1 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 221 8.8 Indicates a contaminant exceeded a federal MCL
PFAS detection 1 compound 64.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 3,693 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 CAL AM - OAKHURST water safe to drink? ▼
CAL AM - OAKHURST (PWS ID: CA2010007) has 231 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 3,693 people using Groundwater sources.
How many people does CAL AM - OAKHURST serve? ▼
CAL AM - OAKHURST serves 3,693 people in SACRAMENTO, California. It is a Private-owned system using Groundwater water sources with 1,119 service connections.
What type of violations does CAL AM - OAKHURST have? ▼
CAL AM - OAKHURST has 231 total violations: 221 health-based violations (MCL exceedances or treatment failures), 6 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in CAL AM - OAKHURST water? ▼
Yes. UCMR5 testing detected 1 PFAS compound in CAL AM - OAKHURST's water supply: lithium. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does CAL AM - OAKHURST use? ▼
CAL AM - OAKHURST uses Groundwater 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. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

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

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by PlainWater Editorial