Is West Harris County Mud 11 Tap Water Safe? Quality Report

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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2013-07-01 → 2013-09-30
MCL	Health-based	Resolved	2013-07-01 → 2013-09-30
MCL	Health-based	Resolved	2013-07-01 → 2013-09-30
MCL	Health-based	Resolved	2013-07-01 → 2013-09-30
MCL	Health-based	Resolved	2010-01-01 → 2010-03-31
MCL	Health-based	Resolved	2010-01-01 → 2010-03-31
MCL	Health-based	Resolved	2010-01-01 → 2010-03-31
MCL	Health-based	Resolved	2010-01-01 → 2010-03-31
MR	Monitoring	Resolved	2013-10-01
MR	Monitoring	Resolved	2011-10-01

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Copper	1004 µg/L 77% of the EPA limit 1300 µg/L worst single sample: 1277 µg/L	85/86	SYR4	2012–2018
Nitrate	33 µg/L 0.3% of the EPA limit 10000 µg/L worst single sample: 40 µg/L	28/42	SYR4	2012–2019
Arsenic	12.79 µg/L 128% of the EPA limit, at the 95th percentile of samples — 10 µg/L worst single sample: 14.8 µg/L	27/28	SYR4	2012–2017
Lead	4.143 µg/L 28% of the EPA limit 15 µg/L worst single sample: 8.4 µg/L	19/86	SYR4	2012–2018
Dibromochloromethane	4.745 µg/L No EPA limit set worst single sample: 6.7 µg/L	18/18	SYR4	2012–2019
Bromoform	4.12 µg/L No EPA limit set worst single sample: 4.4 µg/L	15/18	SYR4	2012–2019
Bromodichloromethane	5.22 µg/L No EPA limit set worst single sample: 9.9 µg/L	14/18	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	12/12	LCR	2024
Dibromoacetic Acid	2.24 µg/L No EPA limit set worst single sample: 2.6 µg/L	7/7	SYR4	2013–2019
TTHM	35.67 µg/L 45% of the EPA limit 80 µg/L worst single sample: 46.2 µg/L	7/7	SYR4	2013–2019
Total Haloacetic Acids (HAA5)	20.32 µg/L 34% of the EPA limit 60 µg/L worst single sample: 28 µg/L	7/7	SYR4	2013–2019
Barium	312.5 µg/L 16% of the EPA limit 2000 µg/L worst single sample: 319 µg/L	6/6	SYR4	2012–2017
Fluoride	935 µg/L 23% of the EPA limit 4000 µg/L worst single sample: 940 µg/L	6/6	SYR4	2012–2017
Nitrate-Nitrite	35 µg/L 0.4% of the EPA limit 10000 µg/L worst single sample: 40 µg/L	6/8	SYR4	2012–2015
Chloroform	21.16 µg/L No EPA limit set worst single sample: 26 µg/L	5/18	SYR4	2012–2019
Dichloroacetic Acid	16.49 µg/L No EPA limit set worst single sample: 18.2 µg/L	3/7	SYR4	2013–2019
Combined Radium (-226 And -228)	1.494 pCi/L 30% of the EPA limit 5 pCi/L worst single sample: 1.52 pCi/L	2/2	SYR4	2012–2014
Selenium	3.595 µg/L 7.2% of the EPA limit 50 µg/L worst single sample: 3.6 µg/L	2/6	SYR4	2012–2017
Lithium	35.9 µg/L No EPA limit set	2/2	UCMR-5	2025
Combined Uranium	1.1 µg/L 3.7% of the EPA limit 30 µg/L	1/1	SYR4	2014
Gross Alpha, Excl. Radon And U	7 pCi/L 47% of the EPA limit 15 pCi/L	1/1	SYR4	2014
Monochloroacetic Acid	4.3 µg/L No EPA limit set	1/7	SYR4	2013–2019
Trichloroacetic Acid	2.9 µg/L No EPA limit set	1/7	SYR4	2013–2019

86 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) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: JOHNSON, ANDREW, C
Phone: 281-894-0930

Frequently asked questions about West Harris County Mud 11

Is West Harris County Mud 11 tap water safe to drink?

EPA monitoring detected 23 contaminants in West Harris County Mud 11'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 West Harris County Mud 11's water?

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

How many people does West Harris County Mud 11 serve?

West Harris County Mud 11 reports serving 8,205 people in Texas, per its EPA record.

Has West Harris County Mud 11 had any water quality violations?

The EPA has 10 violations on file for West Harris County Mud 11, 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.