Idledale Wsd
Community water system in Jefferson County, Colorado, serving 350 people from groundwater under influence of surface water. 8 rules violated in the past three years, 1 still unresolved. Owned by local 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
Consumer Confidence Rule
Other Violation
2 violations, Jul 2025 to open
Consumer Confidence Rule
Other Violation2 violations, Jul 2025 to open
Other Violation: 2 violations, 1 still open, Jul 2025 to open. 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 ruleAlso violated in the past three years
Jul to Sep 2023 to Jul to Sep 2026
Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Monitoring and Reporting
2 violations, Aug 2025 to Sep 2025 · Interim Enhanced Surface Water Treatment Rule
Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Monitoring and Reporting2 violations, Aug 2025 to Sep 2025 · Interim Enhanced Surface Water Treatment Rule
Monitoring and Reporting: 2 violations, Aug 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: Interim Enhanced Surface Water Treatment Rule.
Long Term 2 Enhanced Surface Water Treatment Rule
Monitoring and Reporting
2 violations, Apr 2026 to May 2026 · E. coli (Escherichia coli)
Long Term 2 Enhanced Surface Water Treatment Rule
Monitoring and Reporting2 violations, Apr 2026 to May 2026 · E. coli (Escherichia coli)
Monitoring and Reporting: 2 violations, Apr 2026 to May 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).
Surface Water Treatment Rule
Treatment Technique Violation
Health-based
1 violation, Aug 2021 to Apr 2025
Surface Water Treatment Rule
Treatment Technique Violation Health-based1 violation, Aug 2021 to Apr 2025
Treatment Technique Violation, health-based: 1 violation, Aug 2021 to Apr 2025. The system did not carry out a required treatment process or corrective action.
What the rule requires: All systems using surface water (rivers, lakes, reservoirs) or groundwater under surface influence (GWUDI) must filter and disinfect. Treatment technique violations mean the system failed to maintain adequate disinfectant residual, exceeded turbidity limits, or lacked required permits. Snowmelt and storm events can raise turbidity and pathogen loads in surface water.
Health effects: Without proper filtration/disinfection: Giardia lamblia (severe diarrhea, cramping), Cryptosporidium (life-threatening for immunocompromised individuals), viruses (hepatitis A, norovirus). Turbidity itself is not a health risk but can shield pathogens from disinfection. Limit: Treatment technique: turbidity ≤0.3 NTU in 95% of monthly samples; detectable disinfectant residual in 95% of distribution samples
About this rule
Volatile Organic Chemicals
Monitoring and Reporting
2 violations, Jan 2024 to Dec 2025 · Toluene
Volatile Organic Chemicals
Monitoring and Reporting2 violations, Jan 2024 to Dec 2025 · Toluene
Monitoring and Reporting: 2 violations, Jan 2024 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: Toluene.
Radionuclides and Revised Rad Rule
Monitoring and Reporting
5 violations, Oct 2023 to Aug 2024 · 3 contaminants
Radionuclides and Revised Rad Rule
Monitoring and Reporting5 violations, Oct 2023 to Aug 2024 · 3 contaminants
Monitoring and Reporting: 5 violations, Oct 2023 to Aug 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.
Contaminants on the record: Gross Alpha, Excl. Radon and U, Combined Uranium, Combined Radium (-226 and -228).
Lead and Copper Rule
Monitoring and Reporting
5 violations, Jan 2024 to Oct 2025
Lead and Copper Rule
Monitoring and Reporting5 violations, Jan 2024 to Oct 2025
Monitoring and Reporting: 5 violations, Jan 2024 to Oct 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: 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
9 violations, Apr 2023 to Aug 2026 · Public Notification Rule
Public Notice Rule and Revised PN Rule
Other Violation9 violations, Apr 2023 to Aug 2026 · Public Notification Rule
Other Violation: 9 violations, Apr 2023 to Aug 2026. 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.
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.
Action level 0.015 mg/L · Jan to Jun 2026
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: Private Company. 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 Colorado 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.