Community Water System · PWSID TX2460157

Sonterra Mud

Serves 16,614 peopleSurface Water PurchasedOwner: Local GovernmentAustin, Texas
Nothing open right now.

On record since 2012: 8 violations. 2 over the limit · 6 missed or late tests. Most recent began 2024-12-30.

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
0Notice or report

More violations on record than 56% 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

200520102012 · Missed or late test: 120152017 · Over the limit: 22017 · Over the limit: 22018 · Missed or late test: 32018 · Missed or late test: 32018 · Missed or late test: 320202023 · Missed or late test: 12024 · Missed or late test: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
25% over the limit · 275% missed or late test · 6

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×+Fluoride2017-04-01 · Fluoride: measured 4.30 MG/L vs limit 4.00 MG/L (1.1×)2017-01-01 · Fluoride: measured 4.30 MG/L vs limit 4.00 MG/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 7 results on file · action level 15 ppb

4.6 ppb
3.4 ppb
3.2 ppb
3.2 ppb
2.8 ppb
1.3 ppb
0.43 ppb

Every violation on record

  1. 2024-12-30Lead and Copper RuleLead Consumer NoticeBack in compliance
  2. 2023-01-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  3. 2018-07-01Lead and Copper Rule ×3Water Quality Parameter M/RBack in compliance
  4. 2017-04-01FluorideMCL, Averagemeasured 4.30 MG/L · limit 4.00 MG/LBack in compliance
  5. 2017-01-01FluorideMCL, Averagemeasured 4.30 MG/L · limit 4.00 MG/LBack in compliance
  6. 2012-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance

System details

Population served16,614
Service connections9,221
Water sourceSurface Water Purchased
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityAustin
EPA ZIP on file78701-2744

Areas served

  • Williamson County

Reading this record

Sonterra Mud is a community water system that draws from surface water purchased and serves about 16,614 people in Austin, 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.