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Tap water quality report

Big Oaks Mud

EPA monitoring tested this supplier for 109 contaminants and detected 30. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

109
contaminants tested
30
detected
6,450
people served
0
health-based violations
Texas rankingsLead in TexasPFAS in Texas
Water source
SWP
Ownership
Local government
Counties served
Fort Bend

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.

0
health-based violations
4
violations on file
1
still open
ViolationTypeStatusPeriod
Other Monitoring Unaddressed 2025-07-01
MR Monitoring Resolved 2013-12-30
MR Monitoring Resolved 2013-10-01
MR Monitoring Resolved 2011-10-01

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Pfhxa 0.0069 µg/L 2/4 2023
Pfpea 0.0067 µg/L 2/4 2023
Pfba 0.0056 µg/L 1/4 2023
PFBS 0.0033 µg/L 1/4 2023
PFHXS 0.0032 µg/L 1/4 2023
PFOS 0.0043 µg/L 1/4 2023

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 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
244.75 µg/L 19%
of the EPA limit 1300 µg/L
worst single sample: 360 µg/L
46/60 SYR4 2013–2017
Lead
9.327 µg/L 62%
of the EPA limit 15 µg/L
worst single sample: 10.45 µg/L
22/60 SYR4 2013–2017
Nitrate
650 µg/L 6.5%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Bromodichloromethane
11.97 µg/L
No EPA limit set
worst single sample: 12.3 µg/L
12/12 SYR4 2013–2019
Chloroform
32.71 µg/L
No EPA limit set
worst single sample: 34.8 µg/L
12/12 SYR4 2013–2019
Dibromochloromethane
4.3 µg/L
No EPA limit set
worst single sample: 5.3 µg/L
11/12 SYR4 2013–2019
Lead
0.0015 mg/L 10%
of the EPA limit 0.0150 mg/L
 9/9 LCR 2024
Dibromoacetic Acid
2.94 µg/L
No EPA limit set
worst single sample: 3.3 µg/L
7/7 SYR4 2013–2019
Dichloroacetic Acid
28.17 µg/L
No EPA limit set
worst single sample: 28.8 µg/L
7/7 SYR4 2013–2019
TTHM
44.84 µg/L 56%
of the EPA limit 80 µg/L
worst single sample: 49.1 µg/L
7/7 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
38.92 µg/L 65%
of the EPA limit 60 µg/L
worst single sample: 39.4 µg/L
7/7 SYR4 2013–2019
Trichloroacetic Acid
8.81 µg/L
No EPA limit set
worst single sample: 9.2 µg/L
7/7 SYR4 2013–2019
Atrazine
0.1770 µg/L 5.9%
of the EPA limit 3 µg/L
worst single sample: 0.1800 µg/L
4/7 SYR4 2012–2019
Nitrate-Nitrite
429 µg/L 4.3%
of the EPA limit 10000 µg/L
worst single sample: 450 µg/L
3/3 SYR4 2012–2015
Barium
71.615 µg/L 3.6%
of the EPA limit 2000 µg/L
worst single sample: 72.8 µg/L
2/2 SYR4 2016–2019
Fluoride
396 µg/L 9.9%
of the EPA limit 4000 µg/L
worst single sample: 400 µg/L
2/2 SYR4 2014–2017
Lithium
12.6 µg/L
No EPA limit set
 2/4 UCMR-5 2023
Cyanide
120 µg/L 60%
of the EPA limit 200 µg/L
 1/2 SYR4 2014–2017
Combined Radium (-226 And -228)
3 pCi/L 60%
of the EPA limit 5 pCi/L
 1/1 SYR4 2014
Gross Alpha, Excl. Radon And U
3 pCi/L 20%
of the EPA limit 15 pCi/L
 1/1 SYR4 2014
Gross Beta Particle Activity
4.5 pCi/L
No EPA limit set
 1/1 SYR4 2014
Monochloroacetic Acid
2.1 µg/L
No EPA limit set
 1/7 SYR4 2013–2019
Nitrite
20 µg/L 2%
of the EPA limit 1000 µg/L
 1/3 SYR4 2012–2015
Simazine
0.1200 µg/L 3%
of the EPA limit 4 µg/L
 1/7 SYR4 2012–2019
79 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, TotalArsenicAsbestosBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaOxamylPfdaPfdoaPfeesaPfhpaPfhpsPfmbaPfmpaPFNAPFOAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
ABSHIRE, MICHAEL
Phone
713-651-0220

Frequently asked questions about Big Oaks Mud

Is Big Oaks Mud tap water safe to drink?

EPA monitoring detected 30 contaminants in Big Oaks 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 Big Oaks Mud's water?

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

How many people does Big Oaks Mud serve?

Big Oaks Mud reports serving 6,450 people in Texas, per its EPA record.

Has Big Oaks Mud had any water quality violations?

The EPA has 4 violations on file for Big Oaks Mud, of which 0 are health-based (a contaminant limit or required treatment was breached) and 1 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.