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Tap water quality report

Sonterra Mud

EPA monitoring tested this supplier for 105 contaminants and detected 21. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

105
contaminants tested
21
detected
16,614
people served
8
health-based violations
Texas rankingsLead in TexasPFAS in Texas
Water source
SWP
Ownership
Local government
Counties served
Williamson

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

8
health-based violations
33
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2017-04-01 → 2017-06-30
MCL Health-based Resolved 2017-04-01 → 2017-06-30
MCL Health-based Resolved 2017-04-01 → 2017-06-30
MCL Health-based Resolved 2017-04-01 → 2017-06-30
MCL Health-based Resolved 2017-01-01 → 2017-03-31
MCL Health-based Resolved 2017-01-01 → 2017-03-31
MCL Health-based Resolved 2017-01-01 → 2017-03-31
MCL Health-based Resolved 2017-01-01 → 2017-03-31
MR Monitoring Resolved 2024-12-30
MR Monitoring Resolved 2024-12-30

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFBS 0.0070 µg/L 6/6 2024
Pfpea 0.0157 µg/L 6/6 2024
Pfhxa 0.0060 µg/L 4/6 2024
Pfba 0.0069 µg/L 1/6 2024

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
201 µg/L 15%
of the EPA limit 1300 µg/L
 112/119 SYR4 2014–2019
Lead
17.6 µg/L 117%
of the EPA limit, in the worst sample — 15 µg/L
 50/119 SYR4 2014–2019
Nitrate
260 µg/L 2.6%
of the EPA limit 10000 µg/L
 20/22 SYR4 2012–2019
Fluoride
4590 µg/L 115%
of the EPA limit, in the worst sample — 4000 µg/L
 15/15 SYR4 2012–2019
Lead
0.00043 mg/L 2.9%
of the EPA limit 0.0150 mg/L
 11/11 LCR 2024
Dibromochloromethane
11.9 µg/L
No EPA limit set
 9/14 SYR4 2012–2019
Bromodichloromethane
6.4 µg/L
No EPA limit set
 7/14 SYR4 2012–2019
Bromoform
11.3 µg/L
No EPA limit set
 7/14 SYR4 2012–2019
TTHM
32.9 µg/L 41%
of the EPA limit 80 µg/L
 6/7 SYR4 2012–2019
Lithium
23.3 µg/L
No EPA limit set
 5/6 UCMR-5 2024
Barium
33.5 µg/L 1.7%
of the EPA limit 2000 µg/L
 4/4 SYR4 2014–2019
Nitrate-Nitrite
50 µg/L 0.5%
of the EPA limit 10000 µg/L
 3/3 SYR4 2012–2015
Chloroform
3.3 µg/L
No EPA limit set
 2/14 SYR4 2012–2019
Dibromoacetic Acid
2.4 µg/L
No EPA limit set
 2/7 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
2.4 µg/L 4%
of the EPA limit 60 µg/L
 2/7 SYR4 2012–2019
Arsenic
2.9 µg/L 29%
of the EPA limit 10 µg/L
 1/4 SYR4 2014–2019
Selenium
4.2 µg/L 8.4%
of the EPA limit 50 µg/L
 1/4 SYR4 2014–2019
84 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDichloroacetic AcidDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
FASKE, JOHN
Phone
512-630-6884

Frequently asked questions about Sonterra Mud

Is Sonterra Mud tap water safe to drink?

EPA monitoring detected 21 contaminants in Sonterra Mud's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Sonterra Mud's water?

EPA monitoring detected Copper, Lead, Nitrate, Fluoride, Lead, and others. The full list with the level and data source for each is above.

How many people does Sonterra Mud serve?

Sonterra Mud reports serving 16,614 people in Texas, per its EPA record.

Has Sonterra Mud had any water quality violations?

The EPA has 33 violations on file for Sonterra Mud, of which 8 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.