Community Water System · PWSID AR0000559

Old Union Public Water Authority

Serves 1,200 peopleGroundwaterOwner: Local GovernmentEl Dorado, Arkansas
Nothing open that measures the water, but 3 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 2011: 22 violations. 5 over the limit · 2 missed or late tests · 15 notices or reports. Most recent began 2023-04-01.

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

5Over the limit
0Treatment lapse
2Missed or late test
15Notice or report3 open

More violations on record than 87% of active water systems in Arkansas. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

200520102011 · Over the limit: 120152016 · Over the limit: 12018 · Over the limit: 12018 · Notice or report: 12019 · Over the limit: 12020 · Notice or report: 120202021 · Notice or report: 42021 · Notice or report: 42021 · Notice or report: 42021 · Notice or report: 42022 · Over the limit: 12022 · Missed or late test: 22022 · Missed or late test: 22022 · Notice or report: 52022 · Notice or report: 52022 · Notice or report: 52022 · Notice or report: 52022 · Notice or report: 52023 · Notice or report: 42023 · Notice or report: 42023 · Notice or report: 42023 · Notice or report: 42025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
23% over the limit · 59% missed or late test · 268% notice or report · 15

Across Arkansas, 36% of violations are missed or late tests and 15% are water over a limit.

How far over the limit

at the limit2×5×10×100×+Trihalomethanes (TTHM)2019-01-01 · Trihalomethanes (TTHM): measured 95.00 UG/L vs limit 80.00 UG/L (1.2×)2018-04-01 · Trihalomethanes (TTHM): measured 82.00 UG/L vs limit 80.00 UG/L (1.0×)2016-07-01 · Trihalomethanes (TTHM): measured 86.00 UG/L vs limit 80.00 UG/L (1.1×)2011-07-01 · Trihalomethanes (TTHM): measured 81.00 UG/L vs limit 80.00 UG/L (1.0×)
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.

Open now (3)

  1. 2023-01-01Revised Total Coliform RuleRPTOpen
  2. 2022-10-01Revised Total Coliform RuleRPTOpen
  3. 2022-02-01Revised Total Coliform RuleRPTOpen

Every violation on record

  1. 2023-04-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  2. 2023-02-01Revised Total Coliform RuleRPTBack in compliance
  3. 2023-01-01Revised Total Coliform RuleRPTOpen
  4. 2023-01-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  5. 2022-10-01Revised Total Coliform RuleRPTOpen
  6. 2022-10-01Revised Total Coliform RuleMCLPeriod ended · no return to compliance on file
  7. 2022-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  8. 2022-05-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  9. 2022-03-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  10. 2022-02-01Revised Total Coliform RuleRPTOpen
  11. 2022-02-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  12. 2022-01-01Lead and Copper RuleLead Consumer NoticeBack in compliance
  13. 2021-10-01Revised Total Coliform RuleRPTBack in compliance
  14. 2021-03-01Unknown contaminantOperations ReportBack in compliance
  15. 2021-02-01Revised Total Coliform RuleRPTBack in compliance
  16. 2021-01-01Revised Total Coliform RuleRPTBack in compliance
  17. 2020-06-01Revised Total Coliform RuleRPTBack in compliance
  18. 2019-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 95.00 UG/L · limit 80.00 UG/LBack in compliance
  19. 2018-09-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  20. 2018-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 82.00 UG/L · limit 80.00 UG/LBack in compliance
  21. 2016-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 86.00 UG/L · limit 80.00 UG/LBack in compliance
  22. 2011-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 81.00 UG/L · limit 80.00 UG/LBack in compliance

System details

Population served1,200
Service connections482
Water sourceGroundwater
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityEl Dorado
EPA ZIP on file71730

Areas served

  • Union County

Reading this record

Old Union Public Water Authority is a community water system that draws from groundwater and serves about 1,200 people in El Dorado, Arkansas. 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.