Tapcensus

Golf MHP

Community water system in Malheur County, Oregon, serving 60 people from ground water. 6 rules violated in the past three years, 1 still unresolved. Privately owned.

People served 60 ground water
Rules violated, past 3 years 6 one rule can carry several violations
Unresolved 1 rules still in violation, EPA data updated Oct 7, 2026
Quarters with violations 12 of the last 12 quarters

Quarterly compliance history

SQ3
2023
VQ4
2023
VQ1
2024
SQ2
2024
SQ3
2024
SQ4
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

Public Notice Rule and Revised PN Rule

Other Violation

16 violations, Sep 2023 to open · Public Notification Rule

EPA rule code 410 · 16 violations recorded, 12 still open

Other Violation: 16 violations, 12 still open, Sep 2023 to open. 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, Jul 2025 to Aug 2025

EPA rule code 111 · 1 violation recorded

Monitoring Violation: 1 violation, Jul 2025 to Aug 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

Ground Water Rule

Monitoring and Reporting

3 violations, Dec 2024 to Jun 2026 · E. coli (Escherichia coli)

EPA rule code 140 · 3 violations recorded

Monitoring and Reporting: 3 violations, Dec 2024 to Jun 2026. 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: E. coli (Escherichia coli).

Arsenic Rule

Maximum Contaminant Level ViolationMonitoring and Reporting Health-based

10 violations, Oct 2024 to Jun 2026 · 5 measured values

EPA rule code 332 · 10 violations recorded, 5 health-based

Maximum Contaminant Level Violation, health-based: 5 violations, Apr 2025 to Jun 2026. A sample exceeded the maximum contaminant level EPA allows in drinking water.

Monitoring and Reporting: 5 violations, Oct 2024 to Apr 2026. The system did not complete required monitoring, or did not report the results on time. This does not show that a contaminant was found.

Measured
Arsenic 0.025 MG/L

Limit 0.01 MG/L · Apr to Jun 2026

Arsenic 0.025 MG/L

Limit 0.01 MG/L · Jan to Mar 2026

Arsenic 0.025 MG/L

Limit 0.01 MG/L · Oct to Dec 2025

Arsenic 0.025 MG/L

Limit 0.01 MG/L · Jul to Sep 2025

Arsenic 0.0245 MG/L

Limit 0.01 MG/L · Apr to Jun 2025

What the rule requires: Arsenic is a naturally occurring metalloid found in bedrock and soil. It dissolves into groundwater from natural deposits and can also come from mining, smelting and past pesticide use. EPA lowered the MCL from 50 ppb to 10 ppb in 2001.

Health effects: Long-term arsenic exposure increases risk of bladder, lung, and skin cancers. It is also associated with cardiovascular disease, type 2 diabetes, and developmental effects in children. Arsenic is classified as a Group A human carcinogen by the EPA. Limit: 0.010 mg/L (10 ppb), set in 2001 and enforceable since 2006; the previous MCL was 0.050 mg/L (50 ppb)

About this rule

Nitrate Rule

Maximum Contaminant Level ViolationMonitoring and Reporting Health-based

27 violations, Aug 2023 to Jun 2026 · 18 measured values

EPA rule code 331 · 27 violations recorded, 18 health-based

Maximum Contaminant Level Violation, health-based: 18 violations, Aug 2023 to Jun 2026. A sample exceeded the maximum contaminant level EPA allows in drinking water.

Monitoring and Reporting: 9 violations, Apr 2024 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.

Measured
Nitrate 15 MG/L

Limit 10 MG/L · Apr to Jun 2026

Nitrate 14 MG/L

Limit 10 MG/L · Mar 2026

Nitrate 12 MG/L

Limit 10 MG/L · Feb 2026

Nitrate 14 MG/L

Limit 10 MG/L · Jan 2026

Nitrate 15 MG/L

Limit 10 MG/L · Dec 2025

Nitrate 14 MG/L

Limit 10 MG/L · Nov 2025

12 more in EPA's record

What the rule requires: Nitrate (NO₃) is the most common chemical contaminant in US groundwater, entering from fertilizers, septic systems, and animal waste. It is odorless and tasteless — the only way to know if it's present is to test.

Health effects: Methemoglobinemia in infants under 6 months: gut bacteria convert nitrate to nitrite, which blocks oxygen transport in blood. Pregnant women should also take precautions. Chronic adult exposure at elevated levels may increase cancer risk. Limit: 10 mg/L as nitrogen (NO₃-N)

About this rule

Consumer Confidence Rule

Other Violation

6 violations, Jul 2023 to Apr 2026

EPA rule code 420 · 6 violations recorded

Other Violation: 6 violations, Jul 2023 to Apr 2026. A requirement other than monitoring, reporting, or a contaminant limit, such as public notice or the annual water quality report.

What the rule requires: Community water systems must deliver an annual water quality report (Consumer Confidence Report) to all customers by July 1, covering the previous year. It must list all detected contaminants, compare them to MCLs, identify source water, and include educational language about lead. A violation means the report was not delivered on time or was incomplete.

About this rule

Lead and copper at the tap

The 90th percentile of the tap samples the system collected in its latest monitoring period, against EPA's action level. Levels vary between homes.

Lead 0.00187 mg/L

Action level 0.015 mg/L · Jan 2022 to Dec 2024

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.

A measured value shown with a rule is the sample result EPA recorded with that violation (SDWIS viol_measure), against the limit EPA recorded on the same row (state_mcl), both in EPA's unit as written; violations without a recorded value, such as missed monitoring, show none. Other measured contaminant levels are not part of this record; each system publishes them in its annual Consumer Confidence Report.

Lead and copper are the newest 90th-percentile results in EPA's SDWA data download (LCR_SAMPLES, codes PB90 and CU90), retrieved on Oct 12, 2026: for each monitoring period a system reports the 90th-percentile value of its tap samples, which EPA compares with its action level of 0.015 mg/L for lead and 1.3 mg/L for copper (40 CFR 141.80). A result is not a measurement of any one tap.

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 Oregon 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.