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Community Water System · PWS WA5311300

Carrolls Water Assn

Napavine, Washington 98565 - drinking water served from groundwater sources to 449 people, tracked in EPA SDWIS and UCMR5.

449
People served
238
EPA violations
3
Health-based
Untested
UCMR5 result

The verdict

EPA records 238 drinking-water violations at Carrolls Water Assn, 1% of them health-based - above the Washington per-system average.

238
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
449
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Carrolls Water Assn

Carrolls Water Assn is a private-owned community water system that delivers drinking water to 449 residents in Napavine, Washington (Cowlitz County) through 172 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 238 total violations for this system , of which 3 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 227 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 Lead and Copper Rule, recorded in 22 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 Washington, EPA tracks 4,557 public water systems serving 9,736,844 people, with 314,648 cumulative violations and 20,590 health-based violations on record. About 92% of systems in the state carry at least one violation, and state-wide the average per system is 69 violations. Statewide, 98 of 247 UCMR5-tested systems have reported PFAS detections (39.7%).

Carrolls Water Assn's 238 violations sit above the Washington 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
449
Total Violations
238
Health-Based Violations
3
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
172
County
Cowlitz
School/Daycare
No
MCL Violations
0
Monitoring Violations
227
Treatment Tech Violations
3

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 22 2006
Arsenic MR 7 2002
Barium MR 7 2002
Chromium MR 7 2002
Fluoride MR 7 2002
Cadmium MR 7 2002
Mercury MR 7 2002
Selenium MR 7 2002
CYANIDE MR 6 2002
Antimony, Total MR 6 2002
Thallium, Total MR 6 2002
Nickel MR 6 2002
Beryllium, Total MR 6 2002
Consumer Confidence Rule Other 4 2014
Nitrate MR 4 2021
1,2,4-Trichlorobenzene MR 4 2011
o-Dichlorobenzene MR 4 2011
1,1-Dichloroethylene MR 4 2011
trans-1,2-Dichloroethylene MR 4 2011
1,2-Dichloroethane MR 4 2011
1,1,1-Trichloroethane MR 4 2011
Carbon tetrachloride MR 4 2011
1,1,2-Trichloroethane MR 4 2011
Ethylbenzene MR 4 2011
DICHLOROMETHANE MR 4 2011
p-Dichlorobenzene MR 4 2011
Tetrachloroethylene MR 4 2011
Benzene MR 4 2011
Toluene MR 4 2011
cis-1,2-Dichloroethylene MR 4 2011

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 Carrolls Water Assn.

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 WA5311300 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Washington Drinking Water Authority

Washington State Department of Health, Office of Drinking Water is the primacy agency that licenses and inspects Carrolls Water Assn under EPA-delegated authority.

Open WA regulator portal

Source: Washington State Department of Health, Office 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 MR 4 SDWIS / WA5311300 / 1040
2019 Groundwater Rule TT 3 SDWIS / WA5311300 / 0700
2017 Endrin MR 2 SDWIS / WA5311300 / 2005
2017 BHC-GAMMA MR 2 SDWIS / WA5311300 / 2010
2017 Di(2-ethylhexyl) adipate MR 2 SDWIS / WA5311300 / 2035
2017 Simazine MR 2 SDWIS / WA5311300 / 2037
2017 LASSO MR 2 SDWIS / WA5311300 / 2051
2017 Heptachlor MR 2 SDWIS / WA5311300 / 2065
2017 HEXACHLOROBENZENE MR 2 SDWIS / WA5311300 / 2274
2017 Benzo(a)pyrene MR 2 SDWIS / WA5311300 / 2306
2017 Chlordane MR 2 SDWIS / WA5311300 / 2959
2017 Dalapon MR 2 SDWIS / WA5311300 / 2031
2017 2,4,5-TP MR 2 SDWIS / WA5311300 / 2110
2017 Pentachlorophenol MR 2 SDWIS / WA5311300 / 2326
2017 Di(2-ethylhexyl) phthalate MR 2 SDWIS / WA5311300 / 2039

How Carrolls Water Assn Compares

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

Metric Carrolls Water Assn Washington avg Federal benchmark
Total violations 238 69 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 3 4.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 39.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 449 2,137 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 4,557 regulated public water systems in Washington.

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 Carrolls Water Assn water safe to drink? ▼
Carrolls Water Assn (PWS ID: WA5311300) has 238 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 449 people using Groundwater sources.
How many people does Carrolls Water Assn serve? ▼
Carrolls Water Assn serves 449 people in Napavine, Washington. It is a Private-owned system using Groundwater water sources with 172 service connections.
What type of violations does Carrolls Water Assn have? ▼
Carrolls Water Assn has 238 total violations: 3 health-based violations (MCL exceedances or treatment failures), 227 monitoring/reporting violations, and 3 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Carrolls Water Assn water? ▼
No PFAS testing data is available for Carrolls Water Assn under the EPA's UCMR5 monitoring program.
What water source does Carrolls Water Assn use? ▼
Carrolls Water Assn 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.