Community Water System · PWSID TX1050120

Wimberley Oaks Wsc

Serves 69 peopleGroundwaterOwner: Local GovernmentWimberley, Texas
Nothing open that measures the water, but 4 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 2014: 16 violations. 2 over the limit · 6 missed or late tests · 8 notices or reports. Most recent began 2025-08-08.

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

2Over the limit
0Treatment lapse
6Missed or late test
8Notice or report4 open

More violations on record than 72% of active water systems in Texas. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

200520102014 · Notice or report: 12015 · Missed or late test: 120152016 · Missed or late test: 12016 · Notice or report: 12017 · Over the limit: 12018 · Over the limit: 12018 · Notice or report: 22018 · Notice or report: 220202022 · Missed or late test: 12023 · Notice or report: 12024 · Missed or late test: 22024 · Missed or late test: 22024 · Notice or report: 12025 · Missed or late test: 12025 · Notice or report: 22025 · Notice or report: 22025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
13% over the limit · 238% missed or late test · 650% notice or report · 8

Across Texas, 60% of violations are missed or late tests and 10% are water over a limit.

How far over the limit

at the limit2×5×10×100×+Gross Alpha, Excl. Radon and U2018-01-01 · Gross Alpha, Excl. Radon and U: measured 16.00 PCI/L vs limit 15.00 PCI/L (1.1×)2017-07-01 · Gross Alpha, Excl. Radon and U: measured 17.00 PCI/L vs limit 15.00 PCI/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 3 results on file · action level 15 ppb

3 ppb
0 ppb
0 ppb

Open now (4)

  1. 2025-08-08Public NoticePN Violation for NPDWR ViolationOpen
  2. 2025-03-10Public NoticePN Violation for NPDWR ViolationOpen
  3. 2024-07-02Consumer Confidence RuleCCR Inadequate ReportingOpen
  4. 2023-12-31Public NoticePN Violation for NPDWR ViolationOpen

Every violation on record

  1. 2025-08-08Public NoticePN Violation for NPDWR ViolationOpen
  2. 2025-03-10Public NoticePN Violation for NPDWR ViolationOpen
  3. 2025-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  4. 2024-07-02Consumer Confidence RuleCCR Inadequate ReportingOpen
  5. 2024-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  6. 2024-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  7. 2023-12-31Public NoticePN Violation for NPDWR ViolationOpen
  8. 2022-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  9. 2018-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  10. 2018-03-04Public NoticePN Violation for NPDWR ViolationBack in compliance
  11. 2018-01-01Gross Alpha, Excl. Radon and UMCL, Averagemeasured 16.00 PCI/L · limit 15.00 PCI/LBack in compliance
  12. 2017-07-01Gross Alpha, Excl. Radon and UMCL, Averagemeasured 17.00 PCI/L · limit 15.00 PCI/LBack in compliance
  13. 2016-12-30Lead and Copper RuleLead Consumer NoticeBack in compliance
  14. 2016-07-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  15. 2015-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  16. 2014-07-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance

System details

Population served69
Service connections27
Water sourceGroundwater
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityWimberley
EPA ZIP on file78676-1642

Areas served

  • Hays County

Reading this record

Wimberley Oaks Wsc is a community water system that draws from groundwater and serves about 69 people in Wimberley, Texas. 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.