Community Water System · PWSID CO0110040

St Marys Glacier Wsd

Serves 451 peopleGroundwater Under InfluenceOwner: Local GovernmentWheat Ridge, Colorado
1 open treatment violation.

Open for: Groundwater Rule. EPA counts treatment-technique violations as health-based: a required protective step was not done. It is not a measurement of contamination.

On record since 2007: 34 violations. 7 treatment lapses · 19 missed or late tests · 8 notices or reports. Most recent began 2025-08-15.

None of them is a measurement of contaminated water.

For this year's test results, ask the utility for its annual Consumer Confidence Report. Every community system must publish one.

0Over the limit
7Treatment lapse1 open
19Missed or late test
8Notice or report

More violations on record than 88% of active water systems in Colorado. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

20052007 · Missed or late test: 12007 · Notice or report: 120102013 · Missed or late test: 12014 · Treatment lapse: 120152017 · Notice or report: 12018 · Treatment lapse: 12018 · Missed or late test: 22018 · Missed or late test: 22018 · Notice or report: 22018 · Notice or report: 22019 · Treatment lapse: 12019 · Missed or late test: 12019 · Notice or report: 120202021 · Treatment lapse: 12021 · Missed or late test: 32021 · Missed or late test: 32021 · Missed or late test: 32022 · Missed or late test: 42022 · Missed or late test: 42022 · Missed or late test: 42022 · Missed or late test: 42023 · Treatment lapse: 12023 · Missed or late test: 62023 · Missed or late test: 62023 · Missed or late test: 62023 · Missed or late test: 62023 · Missed or late test: 62023 · Missed or late test: 62023 · Notice or report: 12024 · Treatment lapse: 22024 · Treatment lapse: 22024 · Missed or late test: 12024 · Notice or report: 12025 · Notice or report: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
21% treatment lapse · 756% missed or late test · 1924% notice or report · 8

Across Colorado, 74% of violations are missed or late tests and 6% are water over a limit.

Lead & copper at the tap

Utilities sample taps in homes most likely to have lead pipes, and report the 90th-percentile result: 9 in 10 homes sampled came in at or below this number. Above the red line (the action level) the utility must act. The action level is not a safe level; EPA's health goal for lead is zero. EPA's file does not date these results, so they are shown highest first.

Lead, 90th percentile 19 results on file · action level 15 ppb

7 ppb
6 ppb
6 ppb
5 ppb
5 ppb
5 ppb
4.7 ppb
4 ppb
4 ppb
4 ppb
3 ppb
3 ppb
3 ppb
2 ppb
2 ppb
2 ppb
2 ppb
1 ppb
1 ppb

Copper, 90th percentile 6 results on file · action level 1.3 mg/L

3.1 mg/L
2.2 mg/L
1.9 mg/L
1.8 mg/L
1.6 mg/L
1.4 mg/L

Open now (1)

  1. 2014-11-01Groundwater RuleFailure To Address DeficiencyOpen

Every violation on record

  1. 2025-08-15Revised Total Coliform RuleOtherBack in compliance
  2. 2024-06-08Public NoticePN Violation for NPDWR ViolationBack in compliance
  3. 2024-06-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  4. 2024-04-01Surface water treatment (SWTR)Treatment Technique (SWTR and GWR)Back in compliance
  5. 2024-04-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  6. 2023-11-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  7. 2023-11-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  8. 2023-10-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  9. 2023-10-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  10. 2023-06-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  11. 2023-05-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  12. 2023-04-14Public NoticePN Violation for NPDWR ViolationBack in compliance
  13. 2023-02-01Surface water treatment (SWTR)Treatment Technique (SWTR and GWR)Back in compliance
  14. 2022-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  15. 2022-03-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  16. 2022-02-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  17. 2022-01-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  18. 2021-12-03Lead and Copper RuleOCCT/SOWT Treatment Installation/DemonstrationBack in compliance
  19. 2021-12-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  20. 2021-11-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  21. 2021-08-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  22. 2019-10-02Surface water treatment (SWTR)Failure to Filter (SWTR)Back in compliance
  23. 2019-08-29Public NoticePN Violation for NPDWR ViolationBack in compliance
  24. 2019-07-01Lead and Copper RuleInitial, Follow-up, or Routine Source Water M/RBack in compliance
  25. 2018-11-29Public NoticePN Violation for NPDWR ViolationBack in compliance
Show the other 9 entries
  1. 2018-07-01Lead and Copper RuleWater Quality Parameter M/RBack in compliance
  2. 2018-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  3. 2018-03-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  4. 2018-02-28Groundwater RuleFailure To Address DeficiencyBack in compliance
  5. 2017-10-28Revised Total Coliform RuleOtherBack in compliance
  6. 2014-11-01Groundwater RuleFailure To Address DeficiencyOpen
  7. 2013-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  8. 2007-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  9. 2007-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance

System details

Population served451
Service connections292
Water sourceGroundwater Under Influence
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityWheat Ridge
EPA ZIP on file80033

Areas served

  • Clear Creek County

Reading this record

St Marys Glacier Wsd is a community water system that draws from groundwater under influence and serves about 451 people in Wheat Ridge, Colorado. Everything above comes from the EPA's Safe Drinking Water Information System (SDWIS), where states report every violation by every public water system.

Four kinds of violation. Only one is a measurement of the water: over the limit means a test came back above a legal maximum (an MCL). A treatment lapse means a required protective step was not done, such as disinfection, filtration, fixing a defect an inspector found, or filing a lead-pipe inventory. A missed or late test means a required test was skipped or never reported. That is the most common kind, and the most misread: it does not mean the water was bad, and it does not mean the water was fine. Notices and reports covers public notices and the annual Consumer Confidence Report.

Status. “Back in compliance” means the state recorded a return to compliance. “Period ended” means the violation's compliance period is over but no return to compliance was ever filed, which is common in older records. EPA's federal copy lags state records by months, so call the utility for anything current.