Tapcensus

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Community water system in Tahola, Washington, serving 200 people from ground water. 5 rules violated in the past three years, 3 still unresolved. Owned by tribal government.

People served 200 ground water
Rules violated, past 3 years 5 one rule can carry several violations
Unresolved 3 rules still in violation, EPA data updated Oct 7, 2026
Quarters with violations 10 of the last 12 quarters

Quarterly compliance history

–Q3
2023
–Q4
2023
VQ1
2024
VQ2
2024
VQ3
2024
VQ4
2024
SQ1
2025
SQ2
2025
SQ3
2025
SQ4
2025
SQ1
2026
SQ2
2026
UQ3
2026
–No violation identified VViolation identified SSerious violator (EPA enforcement priority) UUndetermined Oldest quarter on the left. Quarters 1 to 12 are the twelve most recent official quarters at EPA's last data refresh; the 13th is the quarter in progress at that refresh, which EPA reports as undetermined.

Still in violation

EPA data updated Oct 7, 2026

Ground Water Rule

Treatment Technique Violation Health-based

5 violations, Oct 2024 to open

EPA rule code 140 · 5 violations recorded, 2 still open, 5 health-based

Treatment Technique Violation, health-based: 5 violations, 2 still open, Oct 2024 to open. The system did not carry out a required treatment process or corrective action.

What the rule requires: The 2006 GWR requires regular sanitary surveys of groundwater systems and targeted corrective action when fecal indicators are found in source water. Systems with significant deficiencies must provide 4-log virus treatment (99.99% removal/inactivation) or fix the deficiency.

Health effects: Protects against enteric viruses, which can contaminate groundwater via cracked well casings, failing septic systems, or animal waste. Viruses persist longer in groundwater than in surface water. Hepatitis A and norovirus are the primary pathogens of concern. Limit: Treatment technique: 4-log virus treatment required when source water has fecal indicators or significant sanitary deficiencies

About this rule

Lead and Copper Rule

Monitoring and Reporting

4 violations, Jan 2024 to open

EPA rule code 350 · 4 violations recorded, 4 still open

Monitoring and Reporting: 4 violations, open since Jan 2024. The system did not complete required monitoring, or did not report the results on time. This does not show that a contaminant was found.

What the rule requires: The 1991 LCR uses action levels rather than MCLs: if the 90th percentile of high-risk tap samples exceeds 15 ppb lead or 1.3 mg/L copper, the system must take escalating corrective actions. Violations typically indicate failure to maintain adequate corrosion control — the treatment that keeps lead from leaching out of pipes, solder, and fixtures.

About this rule

Public Notice Rule and Revised PN Rule

Other Violation

1 violation, Jan 2025 to open · Public Notification Rule

EPA rule code 410 · 1 violation recorded, 1 still open

Other Violation: 1 violation, open since Jan 2025. A requirement other than monitoring, reporting, or a contaminant limit, such as public notice or the annual water quality report.

Contaminant on the record: Public Notification Rule.

Also violated in the past three years

Jul to Sep 2023 to Jul to Sep 2026

Revised Total Coliform Rule

Monitoring Violation

1 violation, Sep 2025 to Sep 2025

EPA rule code 111 · 1 violation recorded

Monitoring Violation: 1 violation, Sep 2025 to Sep 2025. The system did not complete required monitoring. This does not show that a contaminant was found.

What the rule requires: The 2013 RTCR (effective 2016) replaced the original TCR. It triggers automatic E. coli testing whenever total coliform is found. A single E. coli-positive sample is an acute MCL violation. It also requires systems exceeding 5% total coliform-positive samples to conduct a formal assessment and correct any deficiencies, helping prevent contamination before it escalates.

About this rule

Stage 1 Disinfectants and Disinfection Byproducts Rule

Monitoring and Reporting

1 violation, Sep 2025 to Sep 2025 · Chlorine (MRDL)

EPA rule code 210 · 1 violation recorded

Monitoring and Reporting: 1 violation, Sep 2025 to Sep 2025. The system did not complete required monitoring, or did not report the results on time. This does not show that a contaminant was found.

Contaminant on the record: Chlorine (MRDL).

About this data

Rules violated and the list above come from EPA's SDWIS violation records, one row per violation and contaminant, grouped by the rule each row belongs to. A violation counts when its non-compliance period ended on or after Jul 1, 2023, the start of the thirteen quarters ECHO's three-year figures cover, or is still open; it is unresolved when it was still open at EPA's data refresh on Oct 7, 2026. EPA's rule code 500, "Not Regulated", is left out, as in ECHO's counts. Each rule's violation count is EPA's, and one rule can carry several: a missed monitoring round for a group of contaminants is one violation per contaminant and period. Category names are EPA's violation categories.

ECHO's own summary count of rules violated agrees with this grouping for 98.8% of active systems nationally, and its count of rules being violated for 98.7%; where they differ, the figures here follow the rows listed.

Measured contaminant levels are not part of this record; each system publishes them in its annual Consumer Confidence Report.

Service area from EPA's Public Water System Service Area Boundaries dataset: Decision Tree method, Federal agency. The system's location is the centre of the service area EPA publishes for the system.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Washington records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.