Community Water System · PWSID NM3504226

Cundiyo Mdwca

Serves 58 peopleGroundwaterOwner: Local GovernmentCundiyo, New Mexico
Nothing open right now.

On record since 1999: 41 violations. 7 over the limit · 7 missed or late tests · 27 notices or reports. Most recent began 2025-04-01.

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

7Over the limit
0Treatment lapse
7Missed or late test
27Notice or report

More violations on record than 79% 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

1999 · Notice or report: 120002002 · Notice or report: 12004 · Notice or report: 12005 · Notice or report: 22005 · Notice or report: 220052006 · Notice or report: 12007 · Notice or report: 22007 · Notice or report: 22008 · Notice or report: 22008 · Notice or report: 22010 · Missed or late test: 12010 · Notice or report: 120102011 · Notice or report: 12012 · Notice or report: 12013 · Notice or report: 12014 · Notice or report: 12015 · Over the limit: 32015 · Over the limit: 32015 · Over the limit: 320152016 · Over the limit: 22016 · Over the limit: 22016 · Missed or late test: 52016 · Missed or late test: 52016 · Missed or late test: 52016 · Missed or late test: 52016 · Missed or late test: 52016 · Notice or report: 32016 · Notice or report: 32016 · Notice or report: 32017 · Notice or report: 62017 · Notice or report: 62017 · Notice or report: 62017 · Notice or report: 62017 · Notice or report: 62017 · Notice or report: 62018 · Missed or late test: 12018 · Notice or report: 22018 · Notice or report: 22019 · Notice or report: 120202025 · Over the limit: 22025 · Over the limit: 22025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
17% over the limit · 717% missed or late test · 766% notice or report · 27

Across New Mexico, 40% 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×+Gross Alpha, Excl. Radon and U2025-04-01 · Gross Alpha, Excl. Radon and U: measured 28.00 PCI/L vs limit 15.00 PCI/L (1.9×)2025-01-01 · Gross Alpha, Excl. Radon and U: measured 19.00 PCI/L vs limit 15.00 PCI/L (1.3×)2016-04-01 · Gross Alpha, Excl. Radon and U: measured 24.00 PCI/L vs limit 15.00 PCI/L (1.6×)2016-01-01 · Gross Alpha, Excl. Radon and U: measured 28.00 PCI/L vs limit 15.00 PCI/L (1.9×)2015-10-01 · Gross Alpha, Excl. Radon and U: measured 30.00 PCI/L vs limit 15.00 PCI/L (2.0×)2015-07-01 · Gross Alpha, Excl. Radon and U: measured 23.00 PCI/L vs limit 15.00 PCI/L (1.5×)2015-04-01 · Gross Alpha, Excl. Radon and U: measured 18.00 PCI/L vs limit 15.00 PCI/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 1 result on file · action level 15 ppb

1.6 ppb

Every violation on record

  1. 2025-04-01Gross Alpha, Excl. Radon and UMCL, Averagemeasured 28.00 PCI/L · limit 15.00 PCI/LPeriod ended · no return to compliance on file
  2. 2025-01-01Gross Alpha, Excl. Radon and UMCL, Averagemeasured 19.00 PCI/L · limit 15.00 PCI/LPeriod ended · no return to compliance on file
  3. 2019-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  4. 2018-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  5. 2018-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  6. 2018-04-02Public NoticePN Violation for NPDWR ViolationBack in compliance
  7. 2017-10-18Public Notice ×4PN Violation for NPDWR ViolationBack in compliance
  8. 2017-10-07Public NoticePN Violation for NPDWR ViolationBack in compliance
  9. 2017-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  10. 2016-10-01Revised Total Coliform RuleMONBack in compliance
  11. 2016-09-29Public NoticePN Violation for NPDWR ViolationBack in compliance
  12. 2016-09-01Revised Total Coliform RuleMONBack in compliance
  13. 2016-08-01Revised Total Coliform RuleMONBack in compliance
  14. 2016-07-01Revised Total Coliform RuleMONBack in compliance
  15. 2016-06-02Revised Total Coliform RuleOtherBack in compliance
  16. 2016-06-01Revised Total Coliform RuleMONBack in compliance
  17. 2016-05-19Public NoticePN Violation for NPDWR ViolationBack in compliance
  18. 2016-04-01Gross Alpha, Excl. Radon and UMCL, Averagemeasured 24.00 PCI/L · limit 15.00 PCI/LPeriod ended · no return to compliance on file
  19. 2016-01-01Gross Alpha, Excl. Radon and UMCL, Averagemeasured 28.00 PCI/L · limit 15.00 PCI/LPeriod ended · no return to compliance on file
  20. 2015-10-01Gross Alpha, Excl. Radon and UMCL, Averagemeasured 30.00 PCI/L · limit 15.00 PCI/LBack in compliance
  21. 2015-07-01Gross Alpha, Excl. Radon and UMCL, Averagemeasured 23.00 PCI/L · limit 15.00 PCI/LBack in compliance
  22. 2015-04-01Gross Alpha, Excl. Radon and UMCL, Averagemeasured 18.00 PCI/L · limit 15.00 PCI/LBack in compliance
  23. 2014-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  24. 2013-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  25. 2012-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
Show the other 13 entries
  1. 2011-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  2. 2010-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  3. 2010-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  4. 2008-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  5. 2008-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  6. 2007-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  7. 2007-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  8. 2006-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  9. 2005-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  10. 2005-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  11. 2004-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  12. 2002-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  13. 1999-10-19Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance

System details

Population served58
Service connections25
Water sourceGroundwater
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityCundiyo
EPA ZIP on file87522

Areas served

  • Cundiyo, Santa Fe County

Reading this record

Cundiyo Mdwca is a community water system that draws from groundwater and serves about 58 people in Cundiyo, 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.