Is Northwest Harris County Mud 10 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
MR	Monitoring	Resolved	2014-12-30
MR	Monitoring	Resolved	2014-12-30
Other	Monitoring	Resolved	2003-08-01
Other	Monitoring	Resolved	2003-07-01
Other	Monitoring	Resolved	2003-06-01
Other	Monitoring	Resolved	2003-05-01
MR	Monitoring	Resolved	2003-04-01 → 2003-04-30
MR	Monitoring	Resolved	2003-04-01 → 2003-04-30
MR	Monitoring	Resolved	2003-04-01 → 2003-04-30
MR	Monitoring	Resolved	2003-04-01 → 2003-04-30

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 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	275.8 µg/L 21% of the EPA limit 1300 µg/L worst single sample: 549 µg/L	35/46	SYR4	2013–2017
Nitrate	164.5 µg/L 1.6% of the EPA limit 10000 µg/L worst single sample: 170 µg/L	32/46	SYR4	2012–2019
Lead	0.00060 mg/L 4% of the EPA limit 0.0150 mg/L	15/15	LCR	2023
Barium	293.4 µg/L 15% of the EPA limit 2000 µg/L worst single sample: 294 µg/L	7/7	SYR4	2013–2019
Fluoride	757 µg/L 19% of the EPA limit 4000 µg/L worst single sample: 760 µg/L	7/7	SYR4	2013–2019
Lead	35.26 µg/L 235% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 49 µg/L	7/46	SYR4	2013–2017
Lithium	42.8 µg/L No EPA limit set	6/6	UCMR-5	2025
Nitrate-Nitrite	82 µg/L 0.8% of the EPA limit 10000 µg/L worst single sample: 100 µg/L	5/5	SYR4	2012–2015
Arsenic	5.245 µg/L 52% of the EPA limit 10 µg/L worst single sample: 5.5 µg/L	4/7	SYR4	2013–2019
Dibromochloromethane	1.355 µg/L No EPA limit set worst single sample: 1.4 µg/L	4/21	SYR4	2013–2019
Gross Beta Particle Activity	5.425 pCi/L No EPA limit set worst single sample: 5.5 pCi/L	4/4	SYR4	2013–2019
Gross Alpha, Excl. Radon And U	8.48 pCi/L 57% of the EPA limit 15 pCi/L worst single sample: 8.9 pCi/L	3/4	SYR4	2013–2019
Combined Radium (-226 And -228)	1.0045 pCi/L 20% of the EPA limit 5 pCi/L worst single sample: 1.02 pCi/L	2/3	SYR4	2013–2019
Bromodichloromethane	0.7000 µg/L No EPA limit set	1/21	SYR4	2013–2019
Bromoform	0.9000 µg/L No EPA limit set	1/21	SYR4	2013–2019
Selenium	3 µg/L 6% of the EPA limit 50 µg/L	1/7	SYR4	2013–2019
TTHM	1 µg/L 1.3% of the EPA limit 80 µg/L	1/7	SYR4	2013–2019

92 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 DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: YHARTE, WENSELADO
Phone: 713-652-6500

Frequently asked questions about Northwest Harris County Mud 10

Is Northwest Harris County Mud 10 tap water safe to drink?

EPA monitoring detected 17 contaminants in Northwest Harris County Mud 10'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 Northwest Harris County Mud 10's water?

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

How many people does Northwest Harris County Mud 10 serve?

Northwest Harris County Mud 10 reports serving 7,671 people in Texas, per its EPA record.

Has Northwest Harris County Mud 10 had any water quality violations?

The EPA has 22 violations on file for Northwest Harris County Mud 10, of which 0 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.