Community Water System · PWSID TX0860010

Chaparral Water System Gillespie

Serves 159 peopleGroundwaterOwner: PrivateDes Peres, Missouri
Nothing open that measures the water, but 2 open testing or paperwork violations.

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 2006: 56 violations. 1 treatment lapse · 26 missed or late tests · 29 notices or reports. Most recent began 2025-04-01.

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
1Treatment lapse
26Missed or late test2 open
29Notice or report

More violations on record than 97% of active water systems in Missouri. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

20052006 · Notice or report: 12007 · Notice or report: 12009 · Notice or report: 22009 · Notice or report: 22010 · Missed or late test: 12010 · Notice or report: 22010 · Notice or report: 220102011 · Missed or late test: 22011 · Missed or late test: 22011 · Notice or report: 62011 · Notice or report: 62011 · Notice or report: 62011 · Notice or report: 62011 · Notice or report: 62011 · Notice or report: 62012 · Notice or report: 42012 · Notice or report: 42012 · Notice or report: 42012 · Notice or report: 42013 · Missed or late test: 12014 · Missed or late test: 12014 · Notice or report: 12015 · Missed or late test: 12015 · Notice or report: 22015 · Notice or report: 220152016 · Missed or late test: 12017 · Missed or late test: 12017 · Notice or report: 12018 · Missed or late test: 22018 · Missed or late test: 22019 · Missed or late test: 62019 · Missed or late test: 62019 · Missed or late test: 62019 · Missed or late test: 62019 · Missed or late test: 62019 · Missed or late test: 62019 · Notice or report: 22019 · Notice or report: 22020 · Missed or late test: 42020 · Missed or late test: 42020 · Missed or late test: 42020 · Missed or late test: 42020 · Notice or report: 22020 · Notice or report: 220202021 · Missed or late test: 22021 · Missed or late test: 22021 · Notice or report: 32021 · Notice or report: 32021 · Notice or report: 32022 · Missed or late test: 12022 · Notice or report: 12023 · Missed or late test: 12024 · Treatment lapse: 12024 · Missed or late test: 12024 · Notice or report: 12025 · Missed or late test: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
2% treatment lapse · 146% missed or late test · 2652% notice or report · 29

Across Missouri, 54% of violations are missed or late tests and 8% 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 4 results on file · action level 15 ppb

18.8 ppb
1.3 ppb
0.8 ppb
0 ppb

Open now (2)

  1. 2015-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen
  2. 2014-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen

Every violation on record

  1. 2025-04-01Lead and Copper RuleLead Consumer NoticeBack in compliance
  2. 2024-10-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  3. 2024-10-01Lead and Copper RuleOCCT/SOWT Study/RecommendationBack in compliance
  4. 2024-01-01Lead and Copper RuleWater Quality Parameter M/RBack in compliance
  5. 2023-01-01NitrateMonitoring, RegularPeriod ended · no return to compliance on file
  6. 2022-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  7. 2022-04-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  8. 2021-12-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  9. 2021-10-02Public NoticePN Violation for NPDWR ViolationBack in compliance
  10. 2021-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  11. 2021-03-01Revised Total Coliform RuleMONBack in compliance
  12. 2021-02-25Public NoticePN Violation for NPDWR ViolationBack in compliance
  13. 2020-11-01Revised Total Coliform RuleMONBack in compliance
  14. 2020-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  15. 2020-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  16. 2020-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  17. 2020-02-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  18. 2020-01-09Public NoticePN Violation for NPDWR ViolationBack in compliance
  19. 2019-12-30Lead and Copper RuleLead Consumer NoticeBack in compliance
  20. 2019-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  21. 2019-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  22. 2019-07-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  23. 2019-06-27Public NoticePN Violation for NPDWR ViolationBack in compliance
  24. 2019-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  25. 2019-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
Show the other 31 entries
  1. 2019-01-01Revised Total Coliform RuleMONBack in compliance
  2. 2018-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  3. 2018-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  4. 2017-09-25Public NoticePN Violation for NPDWR ViolationBack in compliance
  5. 2017-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  6. 2016-12-30Lead and Copper RuleLead Consumer NoticeBack in compliance
  7. 2015-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen
  8. 2015-07-08Public NoticePN Violation for NPDWR ViolationBack in compliance
  9. 2015-02-13Public NoticePN Violation for NPDWR ViolationBack in compliance
  10. 2014-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen
  11. 2014-09-10Public NoticePN Violation for NPDWR ViolationBack in compliance
  12. 2013-12-30Lead and Copper RuleLead Consumer NoticeBack in compliance
  13. 2012-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  14. 2012-05-12Public NoticePN Violation for NPDWR ViolationBack in compliance
  15. 2012-03-11Public NoticePN Violation for NPDWR ViolationBack in compliance
  16. 2012-02-10Public NoticePN Violation for NPDWR ViolationBack in compliance
  17. 2011-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  18. 2011-10-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  19. 2011-10-01E. ColiMonitoring, Source Water (GWR)Back in compliance
  20. 2011-07-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  21. 2011-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  22. 2011-04-15Public NoticePN Violation for NPDWR ViolationBack in compliance
  23. 2011-02-10Public NoticePN Violation for NPDWR ViolationBack in compliance
  24. 2011-01-10Public NoticePN Violation for NPDWR ViolationBack in compliance
  25. 2010-09-01E. ColiMonitoring, Source Water (GWR)Back in compliance
  26. 2010-07-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  27. 2010-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  28. 2009-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  29. 2009-01-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  30. 2007-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  31. 2006-01-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance

System details

Population served159
Service connections53
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityDes Peres
EPA ZIP on file63131-1871

Areas served

  • Gillespie County

Reading this record

Chaparral Water System Gillespie is a community water system that draws from groundwater and serves about 159 people in Des Peres, Missouri. 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.