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Non-Transient Non-Community Water System · PWS CA5402046

McWane Plant and Industrial, LLC

Exeter, California 93221 - drinking water served from groundwater sources to 105 people, tracked in EPA SDWIS and UCMR5.

105
People served
112
EPA violations
103
Health-based
Untested
UCMR5 result

The verdict

EPA records 112 drinking-water violations at McWane Plant and Industrial, LLC, 92% of them health-based - above the California per-system average.

112
Total EPA violations on record
92%
Health-based (MCL / treatment failure)
105
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: McWane Plant and Industrial, LLC

McWane Plant and Industrial, LLC is a private-owned non-transient non-community water system that delivers drinking water to 105 residents in Exeter, California (Tulare County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 112 total violations for this system , of which 103 (92%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 4 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.

The most frequently cited contaminant at this system is Nitrate, recorded in 100 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, 231 of 694 UCMR5-tested systems have reported PFAS detections (33.3%).

McWane Plant and Industrial, LLC's 112 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
105
Total Violations
112
Health-Based Violations
103
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
1
County
Tulare
School/Daycare
No
MCL Violations
103
Monitoring Violations
4
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MCL 100 2021
Coliform (TCR) MCL 3 2009
Nitrate MR 3 2004
Consumer Confidence Rule Other 2 2018
Lead and Copper Rule MR 1 1993

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 McWane Plant and Industrial, LLC.

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 CA5402046 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 McWane Plant and Industrial, LLC 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
2021 Nitrate MCL 100 SDWIS / CA5402046 / 1040
2018 Consumer Confidence Rule Other 2 SDWIS / CA5402046 / 7000
2009 Coliform (TCR) MCL 3 SDWIS / CA5402046 / 3100
2004 Nitrate MR 3 SDWIS / CA5402046 / 1040
1993 Lead and Copper Rule MR 1 SDWIS / CA5402046 / 5000

How McWane Plant and Industrial, LLC Compares

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

Metric McWane Plant and Industrial, LLC California avg Federal benchmark
Total violations 112 21.1 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 103 8.8 Indicates a contaminant exceeded a federal MCL
PFAS detection None 33.3% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 105 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 McWane Plant and Industrial, LLC water safe to drink? ▼
McWane Plant and Industrial, LLC (PWS ID: CA5402046) has 112 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 105 people using Groundwater sources.
How many people does McWane Plant and Industrial, LLC serve? ▼
McWane Plant and Industrial, LLC serves 105 people in Exeter, California. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does McWane Plant and Industrial, LLC have? ▼
McWane Plant and Industrial, LLC has 112 total violations: 103 health-based violations (MCL exceedances or treatment failures), 4 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in McWane Plant and Industrial, LLC water? ▼
No PFAS testing data is available for McWane Plant and Industrial, LLC under the EPA's UCMR5 monitoring program.
What water source does McWane Plant and Industrial, LLC use? ▼
McWane Plant and Industrial, LLC uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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.