Sidwalter
Community water system in Warm Springs, Oregon, serving 130 people from ground water. 10 rules violated in the past three years, 3 still unresolved. Owned by tribal government.
Quarterly compliance history
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
2026
Currently in violation
EPA data updated Oct 7, 2026
Ground Water Rule
Treatment Technique Violation
Health-based
4 violations, Apr 2025 to open
Ground Water Rule
Treatment Technique Violation Health-based4 violations, Apr 2025 to open
Treatment Technique Violation, health-based: 4 violations, open since Apr 2025. 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
2 violations, Oct 2024 to open
Lead and Copper Rule
Monitoring and Reporting2 violations, Oct 2024 to open
Monitoring and Reporting: 2 violations, open since Oct 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
5 violations, Dec 2024 to open · Public Notification Rule
Public Notice Rule and Revised PN Rule
Other Violation5 violations, Dec 2024 to open · Public Notification Rule
Other Violation: 5 violations, open since Dec 2024. 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
Reporting Violation
1 violation, Aug 2023 to Sep 2023
Revised Total Coliform Rule
Reporting Violation1 violation, Aug 2023 to Sep 2023
Reporting Violation: 1 violation, Aug 2023 to Sep 2023. The system did not report required information on time.
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, Jul 2023 to Sep 2023 · Chlorine (MRDL)
Stage 1 Disinfectants and Disinfection Byproducts Rule
Monitoring and Reporting1 violation, Jul 2023 to Sep 2023 · Chlorine (MRDL)
Monitoring and Reporting: 1 violation, Jul 2023 to Sep 2023. 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).
Synthetic Organic Chemicals
Monitoring and Reporting
1 violation, Jan 2023 to Dec 2025 · 2,3,7,8-TCDD (Dioxin)
Synthetic Organic Chemicals
Monitoring and Reporting1 violation, Jan 2023 to Dec 2025 · 2,3,7,8-TCDD (Dioxin)
Monitoring and Reporting: 1 violation, Jan 2023 to Dec 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: 2,3,7,8-TCDD (Dioxin).
Nitrate Rule
Monitoring and Reporting
2 violations, Jan 2023 to Feb 2025
Nitrate Rule
Monitoring and Reporting2 violations, Jan 2023 to Feb 2025
Monitoring and Reporting: 2 violations, Jan 2023 to Feb 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.
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.
About this rule
Radionuclides and Revised Rad Rule
Monitoring and Reporting
3 violations, Jan 2020 to Dec 2025 · 3 contaminants
Radionuclides and Revised Rad Rule
Monitoring and Reporting3 violations, Jan 2020 to Dec 2025 · 3 contaminants
Monitoring and Reporting: 3 violations, Jan 2020 to Dec 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.
Contaminants on the record: Gross Alpha, Excl. Radon and U, Combined Uranium, Combined Radium (-226 and -228).
Lead and Copper Rule Revisions
Reporting ViolationTreatment Technique Violation
Health-based
2 violations, Oct 2024 to Oct 2025
Lead and Copper Rule Revisions
Reporting ViolationTreatment Technique Violation Health-based2 violations, Oct 2024 to Oct 2025
Treatment Technique Violation, health-based: 1 violation, Oct 2024 to Oct 2025. The system did not carry out a required treatment process or corrective action.
Reporting Violation: 1 violation, Oct 2024 to Oct 2025. The system did not report required information on time.
What the rule requires: The 2021 LCRR updated the 1991 LCR with mandatory lead service line inventories and replacement planning, a new 'trigger level' at 10 ppb requiring optimization, and strengthened public education. The 2024 Lead and Copper Rule Improvements (LCRI) further requires replacing all lead service lines within 10 years.
Health effects: Same as Lead and Copper Rule (5000). Violations typically reflect failure to complete the required lead service line inventory or submit a required replacement plan. Lead service lines are the primary source of lead at the tap in many older systems. Limit: Lead action level: 15 ppb (trigger level: 10 ppb); copper action level: 1.3 mg/L
About this rule
Consumer Confidence Rule
Other Violation
1 violation, Jul 2023 to Jul 2023
Consumer Confidence Rule
Other Violation1 violation, Jul 2023 to Jul 2023
Other Violation: 1 violation, Jul 2023 to Jul 2023. 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 ruleLead 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.
Action level 0.015 mg/L · Jan 2019 to Dec 2021
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): 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.
Service area from EPA's Public Water System Service Area Boundaries dataset: Random Forest 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 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.