Is Northwest Harris County Mud 23 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	2008-09-01 → 2008-09-30
MCL	Health-based	Resolved	2008-09-01 → 2008-09-30
MCL	Health-based	Resolved	2008-09-01 → 2008-09-30
MON	Monitoring	Resolved	2023-01-01 → 2023-01-31
MON	Monitoring	Resolved	2023-01-01 → 2023-01-31
MON	Monitoring	Resolved	2023-01-01 → 2023-01-31
MON	Monitoring	Resolved	2023-01-01 → 2023-01-31
MON	Monitoring	Resolved	2022-01-01 → 2022-01-31
MON	Monitoring	Resolved	2022-01-01 → 2022-01-31
MON	Monitoring	Resolved	2022-01-01 → 2022-01-31

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	266.8 µg/L 21% of the EPA limit 1300 µg/L worst single sample: 518 µg/L	53/62	SYR4	2013–2019
Chloroform	17 µg/L No EPA limit set worst single sample: 28.9 µg/L	29/30	SYR4	2012–2019
Bromodichloromethane	3.425 µg/L No EPA limit set worst single sample: 3.9 µg/L	26/30	SYR4	2012–2019
Lead	6.1 µg/L 41% of the EPA limit 15 µg/L worst single sample: 27 µg/L	20/62	SYR4	2013–2019
Nitrate	1370 µg/L 14% of the EPA limit 10000 µg/L	16/16	SYR4	2012–2019
Lead	0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L	13/13	LCR	2025
Benzene	2.38 µg/L 48% of the EPA limit 5 µg/L worst single sample: 3.1 µg/L	10/22	SYR4	2012–2019
Xylenes, Total	126.52 µg/L 1.3% of the EPA limit 10000 µg/L worst single sample: 210 µg/L	9/22	SYR4	2012–2019
Dichloroacetic Acid	21.17 µg/L No EPA limit set worst single sample: 23.9 µg/L	8/8	SYR4	2012–2019
TTHM	25.52 µg/L 32% of the EPA limit 80 µg/L worst single sample: 31.4 µg/L	8/8	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	24.695 µg/L 41% of the EPA limit 60 µg/L worst single sample: 26.9 µg/L	8/8	SYR4	2012–2019
Trichloroacetic Acid	3.455 µg/L No EPA limit set worst single sample: 3.7 µg/L	8/8	SYR4	2012–2019
Monochloroacetic Acid	3.72 µg/L No EPA limit set worst single sample: 4.1 µg/L	5/8	SYR4	2012–2019
Ethylbenzene	18.99 µg/L 2.7% of the EPA limit 700 µg/L worst single sample: 21 µg/L	3/22	SYR4	2012–2019
Nitrate-Nitrite	1209 µg/L 12% of the EPA limit 10000 µg/L worst single sample: 1270 µg/L	3/3	SYR4	2012–2015
Nitrite	29 µg/L 2.9% of the EPA limit 1000 µg/L worst single sample: 30 µg/L	3/3	SYR4	2012–2015
Barium	120.54 µg/L 6% of the EPA limit 2000 µg/L worst single sample: 122 µg/L	2/2	SYR4	2014–2017
Fluoride	178 µg/L 4.5% of the EPA limit 4000 µg/L worst single sample: 180 µg/L	2/2	SYR4	2014–2017
Toluene	1.75 µg/L 0.2% of the EPA limit 1000 µg/L worst single sample: 1.8 µg/L	2/22	SYR4	2012–2019
Arsenic	3.2 µg/L 32% of the EPA limit 10 µg/L	1/2	SYR4	2014–2017
Atrazine	0.1300 µg/L 4.3% of the EPA limit 3 µg/L	1/2	SYR4	2015–2018
Cyanide	140 µg/L 70% of the EPA limit 200 µg/L	1/2	SYR4	2014–2017
Combined Radium (-226 And -228)	1.5 pCi/L 30% of the EPA limit 5 pCi/L	1/1	SYR4	2015
Dibromochloromethane	0.5000 µg/L No EPA limit set	1/30	SYR4	2012–2019

85 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, TotalAsbestosBhc-GammaBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDinosebEthylene DibromideEndrinGross Alpha, Excl. Radon And UGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: BENSEN, BARBARA
Phone: 713-864-5466

Frequently asked questions about Northwest Harris County Mud 23

Is Northwest Harris County Mud 23 tap water safe to drink?

EPA monitoring detected 24 contaminants in Northwest Harris County Mud 23'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 23's water?

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

How many people does Northwest Harris County Mud 23 serve?

Northwest Harris County Mud 23 reports serving 4,470 people in Texas, per its EPA record.

Has Northwest Harris County Mud 23 had any water quality violations?

The EPA has 17 violations on file for Northwest Harris County Mud 23, of which 3 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.