Community Water System · PWSID CO0128900

Walsenburg City of

Serves 3,230 peopleSurface WaterOwner: Local GovernmentWalsenburg, Colorado
1 open treatment violation.

Open for: Lead service line inventory. 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 2015: 70 violations. 4 over the limit · 20 treatment lapses · 17 missed or late tests · 29 notices or reports. Most recent began 2025-09-08.

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

4Over the limit
20Treatment lapse1 open
17Missed or late test
29Notice or report2 open

More violations on record than 94% 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

200520102015 · Treatment lapse: 22015 · Missed or late test: 220152016 · Treatment lapse: 12016 · Notice or report: 22017 · Missed or late test: 72017 · Missed or late test: 72017 · Missed or late test: 72017 · Missed or late test: 72018 · Treatment lapse: 12018 · Missed or late test: 12018 · Notice or report: 42018 · Notice or report: 42019 · Over the limit: 32019 · Over the limit: 32019 · Missed or late test: 22019 · Notice or report: 12020 · Over the limit: 12020 · Treatment lapse: 82020 · Treatment lapse: 82020 · Treatment lapse: 82020 · Treatment lapse: 82020 · Missed or late test: 32020 · Missed or late test: 32020 · Notice or report: 52020 · Notice or report: 52020 · Notice or report: 520202021 · Treatment lapse: 52021 · Treatment lapse: 52021 · Treatment lapse: 52021 · Notice or report: 22022 · Treatment lapse: 22022 · Notice or report: 52022 · Notice or report: 52022 · Notice or report: 52023 · Notice or report: 22024 · Treatment lapse: 12024 · Missed or late test: 12024 · Notice or report: 32024 · Notice or report: 32025 · Missed or late test: 12025 · Notice or report: 52025 · Notice or report: 52025 · Notice or report: 52025
One square ≈ 2 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
6% over the limit · 429% treatment lapse · 2024% missed or late test · 1741% notice or report · 29

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

How far over the limit

at the limit2×5×10×100×+Trihalomethanes (TTHM)2020-01-01 · Trihalomethanes (TTHM): measured 104.15 UG/L vs limit 80.00 UG/L (1.3×)2019-10-01 · Trihalomethanes (TTHM): measured 104.95 UG/L vs limit 80.00 UG/L (1.3×)2019-07-01 · Trihalomethanes (TTHM): measured 0.1060 MG/L vs limit 0.0800 MG/L (1.3×)2019-04-01 · Trihalomethanes (TTHM): measured 0.0980 MG/L vs limit 0.0800 MG/L (1.2×)
Each dot is one over-the-limit violation: the measured value divided by the limit it broke, on a log scale. Most legal limits for chemicals are running averages set for a lifetime of drinking, so “just over” and “ten times over” are very different news. Hover a dot for the numbers.

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 11 results on file · action level 15 ppb

13 ppb
11 ppb
11 ppb
10 ppb
10 ppb
9 ppb
9 ppb
8.5 ppb
8 ppb
4 ppb
3.8 ppb

Open now (3)

  1. 2025-09-08Public NoticePN Violation for NPDWR ViolationOpen
  2. 2024-10-17Lead service line inventoryRPTOpen
  3. 2024-10-17Lead service line inventoryTTOpen

Every violation on record

  1. 2025-09-08Public NoticePN Violation for NPDWR ViolationOpen
  2. 2025-07-04Public NoticePN Violation without NPDWR ViolationBack in compliance
  3. 2025-04-04Public NoticePN Violation without NPDWR ViolationBack in compliance
  4. 2025-04-03Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  5. 2025-03-08Public NoticePN Violation for NPDWR ViolationBack in compliance
  6. 2025-01-04Public NoticePN Violation without NPDWR ViolationBack in compliance
  7. 2024-12-08Public NoticePN Violation for NPDWR ViolationBack in compliance
  8. 2024-10-17Lead service line inventoryRPTOpen
  9. 2024-10-17Lead service line inventoryTTOpen
  10. 2024-10-04Public NoticePN Violation without NPDWR ViolationBack in compliance
  11. 2024-10-01Lead and Copper RuleLead Consumer NoticeBack in compliance
  12. 2023-10-04Public NoticePN Violation without NPDWR ViolationBack in compliance
  13. 2023-04-04Public NoticePN Violation without NPDWR ViolationBack in compliance
  14. 2022-10-16Public NoticePN Violation for NPDWR ViolationBack in compliance
  15. 2022-10-04Public NoticePN Violation without NPDWR ViolationBack in compliance
  16. 2022-09-25Public NoticePN Violation without NPDWR ViolationBack in compliance
  17. 2022-08-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  18. 2022-07-04Public NoticePN Violation without NPDWR ViolationBack in compliance
  19. 2022-06-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  20. 2022-04-04Public NoticePN Violation without NPDWR ViolationBack in compliance
  21. 2021-09-25Public NoticePN Violation without NPDWR ViolationBack in compliance
  22. 2021-09-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  23. 2021-08-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  24. 2021-07-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  25. 2021-06-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
Show the other 45 entries
  1. 2021-03-25Public NoticePN Violation without NPDWR ViolationBack in compliance
  2. 2021-01-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  3. 2020-12-25Public NoticePN Violation without NPDWR ViolationBack in compliance
  4. 2020-12-17Public NoticePN Violation for NPDWR ViolationBack in compliance
  5. 2020-12-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  6. 2020-11-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  7. 2020-10-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  8. 2020-09-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  9. 2020-08-25Revised Total Coliform RuleOtherBack in compliance
  10. 2020-08-24Public NoticePN Violation for NPDWR ViolationBack in compliance
  11. 2020-08-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  12. 2020-07-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  13. 2020-06-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  14. 2020-05-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  15. 2020-05-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  16. 2020-04-12Public NoticePN Violation for NPDWR ViolationBack in compliance
  17. 2020-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 104.15 UG/L · limit 80.00 UG/LBack in compliance
  18. 2020-01-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  19. 2020-01-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  20. 2019-11-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  21. 2019-11-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  22. 2019-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 104.95 UG/L · limit 80.00 UG/LBack in compliance
  23. 2019-07-20Public NoticePN Violation for NPDWR ViolationBack in compliance
  24. 2019-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1060 MG/L · limit 0.0800 MG/LBack in compliance
  25. 2019-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0980 MG/L · limit 0.0800 MG/LBack in compliance
  26. 2018-12-22Public NoticePN Violation without NPDWR ViolationBack in compliance
  27. 2018-12-01Surface water treatment (SWTR)Treatment Technique (SWTR and GWR)Back in compliance
  28. 2018-09-08Public NoticePN Violation without NPDWR ViolationBack in compliance
  29. 2018-08-01E. ColiMonitoring, Source Water (LT2)Back in compliance
  30. 2018-06-08Public NoticePN Violation without NPDWR ViolationBack in compliance
  31. 2018-03-08Public NoticePN Violation without NPDWR ViolationBack in compliance
  32. 2017-12-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  33. 2017-11-01E. ColiMonitoring, Source Water (LT2)Back in compliance
  34. 2017-11-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  35. 2017-10-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  36. 2017-09-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  37. 2017-08-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  38. 2017-07-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  39. 2016-04-01Surface water treatment (SWTR)Treatment Technique (SWTR and GWR)Back in compliance
  40. 2016-04-01Public NoticePN Violation without NPDWR ViolationBack in compliance
  41. 2016-01-11Public NoticePN Violation without NPDWR ViolationBack in compliance
  42. 2015-07-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  43. 2015-07-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  44. 2015-07-01Surface water treatment (SWTR)Failure to Filter (SWTR)Back in compliance
  45. 2015-05-11Groundwater RuleFailure To Address DeficiencyBack in compliance

System details

Population served3,230
Service connections1,928
Water sourceSurface Water
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityWalsenburg
EPA ZIP on file81089

Areas served

  • Huerfano County

Reading this record

Walsenburg City of is a community water system that draws from surface water and serves about 3,230 people in Walsenburg, 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.