Non-Transient Non-Community · PWSID CO0234480

Durango La Plata Airport

Serves 780 peopleGroundwater Under InfluenceOwner: Local GovernmentDurango, Colorado
Nothing open that measures the water, but 1 open testing or paperwork violation.

A missed test is not evidence of bad water. It also is not evidence of good water: for that period nobody checked.

On record since 2002: 36 violations. 12 over the limit · 3 treatment lapses · 20 missed or late tests · 1 notice or report. Most recent began 2025-10-01.

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

12Over the limit
3Treatment lapse
20Missed or late test1 open
1Notice or report

More violations on record than 89% 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

2002 · Treatment lapse: 12005201020152017 · Over the limit: 22017 · Over the limit: 22018 · Over the limit: 42018 · Over the limit: 42018 · Over the limit: 42018 · Over the limit: 42018 · Treatment lapse: 12018 · Missed or late test: 22018 · Missed or late test: 22019 · Over the limit: 42019 · Over the limit: 42019 · Over the limit: 42019 · Over the limit: 42019 · Missed or late test: 22019 · Missed or late test: 22019 · Notice or report: 12020 · Over the limit: 22020 · Over the limit: 22020 · Missed or late test: 42020 · Missed or late test: 42020 · Missed or late test: 42020 · Missed or late test: 420202021 · Missed or late test: 12022 · Treatment lapse: 12022 · Missed or late test: 32022 · Missed or late test: 32022 · Missed or late test: 32023 · Missed or late test: 72023 · Missed or late test: 72023 · Missed or late test: 72023 · Missed or late test: 72023 · Missed or late test: 72023 · Missed or late test: 72023 · Missed or late test: 72025 · Missed or late test: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
33% over the limit · 128% treatment lapse · 356% missed or late test · 203% notice or report · 1

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)2020-04-01 · Trihalomethanes (TTHM): measured 87.00 UG/L vs limit 80.00 UG/L (1.1×)2020-01-01 · Trihalomethanes (TTHM): measured 85.50 UG/L vs limit 80.00 UG/L (1.1×)2019-10-01 · Trihalomethanes (TTHM): measured 81.47 UG/L vs limit 80.00 UG/L (1.0×)2019-07-01 · Trihalomethanes (TTHM): measured 82.98 UG/L vs limit 80.00 UG/L (1.0×)2019-04-01 · Trihalomethanes (TTHM): measured 0.0950 MG/L vs limit 0.0800 MG/L (1.2×)2019-01-01 · Trihalomethanes (TTHM): measured 0.1060 MG/L vs limit 0.0800 MG/L (1.3×)2018-10-01 · Trihalomethanes (TTHM): measured 0.1090 MG/L vs limit 0.0800 MG/L (1.4×)2018-07-01 · Trihalomethanes (TTHM): measured 0.1140 MG/L vs limit 0.0800 MG/L (1.4×)2018-04-01 · Trihalomethanes (TTHM): measured 0.0970 MG/L vs limit 0.0800 MG/L (1.2×)2018-01-01 · Trihalomethanes (TTHM): measured 0.0840 MG/L vs limit 0.0800 MG/L (1.1×)2017-10-01 · Trihalomethanes (TTHM): measured 0.0880 MG/L vs limit 0.0800 MG/L (1.1×)2017-07-01 · Trihalomethanes (TTHM): measured 0.0860 MG/L vs limit 0.0800 MG/L (1.1×)
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 14 results on file · action level 15 ppb

2.6 ppb
1.5 ppb
1.3 ppb
1.1 ppb
1 ppb
0.9 ppb
0.8 ppb
0.8 ppb
0.7 ppb
0.6 ppb
0.5 ppb
0 ppb
0 ppb
0 ppb

Copper, 90th percentile 1 result on file · action level 1.3 mg/L

1.4 mg/L

Open now (1)

  1. 2025-10-01Lead and Copper RuleLead Consumer NoticeOpen

Every violation on record

  1. 2025-10-01Lead and Copper RuleLead Consumer NoticeOpen
  2. 2023-10-01Lead and Copper RuleLead Consumer NoticeBack in compliance
  3. 2023-07-01Revised Total Coliform RuleMONBack in compliance
  4. 2023-07-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  5. 2023-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  6. 2023-04-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  7. 2023-04-01Surface water treatment (SWTR) ×2Monitoring of Treatment (SWTR-Filter)Back in compliance
  8. 2022-09-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  9. 2022-09-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  10. 2022-01-01Lead and Copper RuleOCCT/SOWT Study/RecommendationBack in compliance
  11. 2022-01-01Lead and Copper RuleInitial, Follow-up, or Routine Source Water M/RBack in compliance
  12. 2021-01-01Lead and Copper RuleWater Quality Parameter M/RBack in compliance
  13. 2020-10-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  14. 2020-10-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  15. 2020-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 87.00 UG/L · limit 80.00 UG/LBack in compliance
  16. 2020-02-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  17. 2020-02-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  18. 2020-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 85.50 UG/L · limit 80.00 UG/LBack in compliance
  19. 2019-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 81.47 UG/L · limit 80.00 UG/LBack in compliance
  20. 2019-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 82.98 UG/L · limit 80.00 UG/LBack in compliance
  21. 2019-05-02Public NoticePN Violation for NPDWR ViolationBack in compliance
  22. 2019-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0950 MG/L · limit 0.0800 MG/LBack in compliance
  23. 2019-03-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  24. 2019-03-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  25. 2019-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1060 MG/L · limit 0.0800 MG/LBack in compliance
Show the other 10 entries
  1. 2018-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1090 MG/L · limit 0.0800 MG/LBack in compliance
  2. 2018-09-18Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  3. 2018-08-01E. ColiMonitoring, Source Water (LT2)Back in compliance
  4. 2018-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1140 MG/L · limit 0.0800 MG/LBack in compliance
  5. 2018-07-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  6. 2018-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0970 MG/L · limit 0.0800 MG/LBack in compliance
  7. 2018-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0840 MG/L · limit 0.0800 MG/LBack in compliance
  8. 2017-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0880 MG/L · limit 0.0800 MG/LBack in compliance
  9. 2017-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0860 MG/L · limit 0.0800 MG/LBack in compliance
  10. 2002-01-19Surface water treatment (SWTR)Failure to Filter (SWTR)Back in compliance

System details

Population served780
Service connections37
Water sourceGroundwater Under Influence
System typeNon-Transient Non-Community
OwnerLocal Government
StatusActive
CityDurango
EPA ZIP on file81303

Areas served

  • La Plata County

Reading this record

Durango La Plata Airport is a non-transient non-community that draws from groundwater under influence and serves about 780 people in Durango, 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.