Community Water System · PWSID NM3508217

Coal Basin Dwua

Serves 116 peopleGroundwaterOwner: Local GovernmentGallup, New Mexico
3 open treatment violations.

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 2000: 54 violations. 10 treatment lapses · 17 missed or late tests · 27 notices or reports. Most recent began 2024-10-23.

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
10Treatment lapse3 open
17Missed or late test
27Notice or report2 open

More violations on record than 85% of active water systems in New Mexico. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

2000 · Notice or report: 120002001 · Notice or report: 32001 · Notice or report: 32001 · Notice or report: 32004 · Notice or report: 120052006 · Notice or report: 12007 · Notice or report: 12008 · Notice or report: 42008 · Notice or report: 42008 · Notice or report: 42008 · Notice or report: 42009 · Notice or report: 32009 · Notice or report: 32009 · Notice or report: 320102011 · Missed or late test: 12011 · Notice or report: 12012 · Missed or late test: 12014 · Missed or late test: 42014 · Missed or late test: 42014 · Missed or late test: 42014 · Missed or late test: 42014 · Notice or report: 120152016 · Missed or late test: 92016 · Missed or late test: 92016 · Missed or late test: 92016 · Missed or late test: 92016 · Missed or late test: 92016 · Missed or late test: 92016 · Missed or late test: 92016 · Missed or late test: 92016 · Missed or late test: 92016 · Notice or report: 32016 · Notice or report: 32016 · Notice or report: 32017 · Treatment lapse: 32017 · Treatment lapse: 32017 · Treatment lapse: 32017 · Notice or report: 22017 · Notice or report: 22018 · Notice or report: 22018 · Notice or report: 22019 · Treatment lapse: 22019 · Treatment lapse: 22019 · Notice or report: 22019 · Notice or report: 22020 · Notice or report: 22020 · Notice or report: 220202022 · Missed or late test: 12023 · Missed or late test: 12024 · Treatment lapse: 52024 · Treatment lapse: 52024 · Treatment lapse: 52024 · Treatment lapse: 52024 · Treatment lapse: 52025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
19% treatment lapse · 1031% missed or late test · 1750% notice or report · 27

Across New Mexico, 40% 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 8 results on file · action level 15 ppb

46 ppb
46 ppb
46 ppb
6 ppb
4 ppb
4 ppb
3 ppb
3 ppb

Open now (5)

  1. 2024-10-23Groundwater Rule ×3Failure To Address DeficiencyOpen
  2. 2007-09-23Public NoticePN Violation for NPDWR ViolationOpen
  3. 2001-07-01Consumer Confidence RuleCCR Complete Failure to ReportOpen

Every violation on record

  1. 2024-10-23Groundwater Rule ×3Failure To Address DeficiencyOpen
  2. 2024-10-23Groundwater Rule ×2Failure To Address DeficiencyBack in compliance
  3. 2023-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  4. 2022-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  5. 2020-06-08Public NoticePN Violation for NPDWR ViolationBack in compliance
  6. 2020-05-21Public NoticePN Violation for NPDWR ViolationBack in compliance
  7. 2019-10-16Groundwater Rule ×2Failure To Address DeficiencyBack in compliance
  8. 2019-07-21Groundwater RuleFailure to Consult with StateBack in compliance
  9. 2019-02-13Public NoticePN Violation for NPDWR ViolationBack in compliance
  10. 2018-03-19Public NoticePN Violation for NPDWR ViolationBack in compliance
  11. 2018-03-15Public NoticePN Violation for NPDWR ViolationBack in compliance
  12. 2017-10-08Public NoticePN Violation for NPDWR ViolationBack in compliance
  13. 2017-04-30Groundwater Rule ×2Failure To Address DeficiencyBack in compliance
  14. 2017-02-02Groundwater RuleFailure to Consult with StateBack in compliance
  15. 2017-02-02Groundwater RuleFailure To Address DeficiencyBack in compliance
  16. 2016-10-01Chlorine ×3Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  17. 2016-08-12Public NoticePN Violation for NPDWR ViolationBack in compliance
  18. 2016-07-01Chlorine ×2Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  19. 2016-06-02Revised Total Coliform RuleOtherBack in compliance
  20. 2016-06-01Revised Total Coliform RuleMONBack in compliance
  21. 2016-04-01Chlorine ×3Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  22. 2016-03-06Public NoticePN Violation for NPDWR ViolationBack in compliance
  23. 2014-10-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  24. 2014-09-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  25. 2014-04-24Public NoticePN Violation for NPDWR ViolationBack in compliance
Show the other 19 entries
  1. 2014-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  2. 2014-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  3. 2012-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  4. 2011-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  5. 2011-01-01AsbestosMonitoring, RegularBack in compliance
  6. 2009-12-05Public NoticePN Violation for NPDWR ViolationBack in compliance
  7. 2009-10-08Public NoticePN Violation for NPDWR ViolationBack in compliance
  8. 2009-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  9. 2008-11-07Public NoticePN Violation for NPDWR ViolationBack in compliance
  10. 2008-10-06Public NoticePN Violation for NPDWR ViolationBack in compliance
  11. 2008-04-19Public NoticePN Violation for NPDWR ViolationBack in compliance
  12. 2008-04-09Public NoticePN Violation for NPDWR ViolationBack in compliance
  13. 2007-09-23Public NoticePN Violation for NPDWR ViolationOpen
  14. 2006-01-16Public NoticePN Violation for NPDWR ViolationBack in compliance
  15. 2004-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  16. 2001-08-01Coliform (TCR)Notification, PublicBack in compliance
  17. 2001-08-01Coliform (TCR)Notification, StateBack in compliance
  18. 2001-07-01Consumer Confidence RuleCCR Complete Failure to ReportOpen
  19. 2000-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance

System details

Population served116
Service connections34
Water sourceGroundwater
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityGallup
EPA ZIP on file87305

Areas served

  • Gallup, Mckinley County

Reading this record

Coal Basin Dwua is a community water system that draws from groundwater and serves about 116 people in Gallup, New Mexico. 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.