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Tap water quality report

Postwood Mud

EPA monitoring tested this supplier for 109 contaminants and detected 16. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

109
contaminants tested
16
detected
3,747
people served
1
health-based violations
Texas rankingsLead in TexasPFAS in Texas
Water source
Ground water
Ownership
Local government
Counties served
Harris

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.

1
health-based violations
2
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 1991-06-01 → 1991-06-30
MR Monitoring Resolved 2013-12-30

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
400 µg/L 31%
of the EPA limit 1300 µg/L
 54/62 SYR4 2013–2019
Nitrate
250 µg/L 2.5%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Lead
0.00074 mg/L 4.9%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2025
Bromoform
2.1 µg/L
No EPA limit set
 6/12 SYR4 2013–2019
Dibromochloromethane
2.3 µg/L
No EPA limit set
 6/12 SYR4 2013–2019
TTHM
5.8 µg/L 7.2%
of the EPA limit 80 µg/L
 6/7 SYR4 2013–2019
Bromodichloromethane
1.4 µg/L
No EPA limit set
 5/12 SYR4 2013–2019
Lead
10.6 µg/L 71%
of the EPA limit 15 µg/L
 4/62 SYR4 2013–2019
Barium
270 µg/L 14%
of the EPA limit 2000 µg/L
 3/3 SYR4 2013–2019
Nitrate-Nitrite
240 µg/L 2.4%
of the EPA limit 10000 µg/L
 3/3 SYR4 2012–2015
Arsenic
2.4 µg/L 24%
of the EPA limit 10 µg/L
 2/3 SYR4 2013–2019
Combined Radium (-226 And -228)
2.7 pCi/L 54%
of the EPA limit 5 pCi/L
 2/2 SYR4 2012–2018
Fluoride
390 µg/L 9.8%
of the EPA limit 4000 µg/L
 2/2 SYR4 2014–2017
Gross Alpha, Excl. Radon And U
4.4 pCi/L 29%
of the EPA limit 15 pCi/L
 2/2 SYR4 2015–2018
Selenium
3.7 µg/L 7.4%
of the EPA limit 50 µg/L
 2/3 SYR4 2013–2019
Lithium
13.2 µg/L
No EPA limit set
 1/1 UCMR-5 2025
93 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 TetrachlorideChlordaneChloroformChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDichloroacetic AcidDinosebEthylene DibromideEndrinEthylbenzeneGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
FLYNN, DIANE, K
Phone
713-942-9922

Frequently asked questions about Postwood Mud

Is Postwood Mud tap water safe to drink?

EPA monitoring detected 16 contaminants in Postwood 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 Postwood Mud's water?

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

How many people does Postwood Mud serve?

Postwood Mud reports serving 3,747 people in Texas, per its EPA record.

Has Postwood Mud had any water quality violations?

The EPA has 2 violations on file for Postwood Mud, of which 1 is 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.