PlainWater
States → California

Community Water System · PWS CA0400007

Butte Creek Estates Mutual Water Co

Chico, California 95926 - drinking water served from groundwater sources to 399 people, tracked in EPA SDWIS and UCMR5.

399
People served
26
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 26 drinking-water violations at Butte Creek Estates Mutual Water Co - above the California per-system average.

26
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
399
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Butte Creek Estates Mutual Water Co

Butte Creek Estates Mutual Water Co is a private-owned community water system that delivers drinking water to 399 residents in Chico, California (Butte County) through 172 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 26 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 25 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is TTHM, recorded in 4 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. Statewide, 447 of 694 UCMR5-tested systems have reported PFAS detections (64.4%).

Butte Creek Estates Mutual Water Co's 26 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
399
Total Violations
26
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
172
County
Butte
School/Daycare
No
MCL Violations
0
Monitoring Violations
25
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MR 4 2022
Nitrite MR 4 2020
Arsenic MR 4 2020
Lead and Copper Rule MR 3 2010
Nitrate MR 2 2020
Revised Total Coliform Rule MON 2 2023
Gross Alpha, Excl. Radon and U MR 2 1981
Coliform (TCR) MR 2 2016
Total Haloacetic Acids (HAA5) MR 2 2022
Consumer Confidence Rule Other 1 2009

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 Butte Creek Estates Mutual Water Co.

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 CA0400007 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 Butte Creek Estates Mutual Water Co 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
2023 Revised Total Coliform Rule MON 2 SDWIS / CA0400007 / 8000
2022 TTHM MR 4 SDWIS / CA0400007 / 2950
2022 Total Haloacetic Acids (HAA5) MR 2 SDWIS / CA0400007 / 2456
2020 Nitrite MR 4 SDWIS / CA0400007 / 1041
2020 Arsenic MR 4 SDWIS / CA0400007 / 1005
2020 Nitrate MR 2 SDWIS / CA0400007 / 1040
2016 Coliform (TCR) MR 2 SDWIS / CA0400007 / 3100
2010 Lead and Copper Rule MR 3 SDWIS / CA0400007 / 5000
2009 Consumer Confidence Rule Other 1 SDWIS / CA0400007 / 7000
1981 Gross Alpha, Excl. Radon and U MR 2 SDWIS / CA0400007 / 4000

How Butte Creek Estates Mutual Water Co Compares

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

Metric Butte Creek Estates Mutual Water Co California avg Federal benchmark
Total violations 26 21.1 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 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 399 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 Butte Creek Estates Mutual Water Co water safe to drink? ▼
Butte Creek Estates Mutual Water Co (PWS ID: CA0400007) has 26 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 399 people using Groundwater sources.
How many people does Butte Creek Estates Mutual Water Co serve? ▼
Butte Creek Estates Mutual Water Co serves 399 people in Chico, California. It is a Private-owned system using Groundwater water sources with 172 service connections.
What type of violations does Butte Creek Estates Mutual Water Co have? ▼
Butte Creek Estates Mutual Water Co has 26 total violations: 0 health-based violations (MCL exceedances or treatment failures), 25 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Butte Creek Estates Mutual Water Co water? ▼
No PFAS testing data is available for Butte Creek Estates Mutual Water Co under the EPA's UCMR5 monitoring program.
What water source does Butte Creek Estates Mutual Water Co use? ▼
Butte Creek Estates Mutual Water Co 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.
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.