Is Harris County Mud 189 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	2014-04-01 → 2014-06-30
MCL	Health-based	Resolved	2014-04-01 → 2014-06-30
MCL	Health-based	Resolved	2014-04-01 → 2014-06-30
MCL	Health-based	Resolved	2014-04-01 → 2014-06-30
MCL	Health-based	Resolved	2008-04-01 → 2008-06-30
MCL	Health-based	Resolved	2008-04-01 → 2008-06-30
MCL	Health-based	Resolved	2008-01-01 → 2008-03-31
MCL	Health-based	Resolved	2008-01-01 → 2008-03-31
MCL	Health-based	Resolved	2008-01-01 → 2008-03-31
MCL	Health-based	Resolved	2008-01-01 → 2008-03-31

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	208.8 µg/L 16% of the EPA limit 1300 µg/L worst single sample: 363 µg/L	59/61	SYR4	2014–2019
Lead	5 µg/L 33% of the EPA limit 15 µg/L worst single sample: 8.26 µg/L	21/61	SYR4	2014–2019
Lead	0.0024 mg/L 16% of the EPA limit 0.0150 mg/L	19/19	LCR	2026
Nitrate	50 µg/L 0.5% of the EPA limit 10000 µg/L	16/32	SYR4	2012–2019
Combined Radium (-226 And -228)	4.935 pCi/L 99% of the EPA limit 5 pCi/L worst single sample: 5 pCi/L	14/14	SYR4	2013–2018
Gross Alpha, Excl. Radon And U	18.535 pCi/L 124% of the EPA limit, at the 95th percentile of samples — 15 pCi/L worst single sample: 22.5 pCi/L	14/14	SYR4	2013–2018
Gross Beta Particle Activity	11 pCi/L No EPA limit set worst single sample: 12.1 pCi/L	11/14	SYR4	2013–2018
Arsenic	6.435 µg/L 64% of the EPA limit 10 µg/L worst single sample: 6.6 µg/L	4/4	SYR4	2014–2017
Barium	345.85 µg/L 17% of the EPA limit 2000 µg/L worst single sample: 349 µg/L	4/4	SYR4	2014–2017
Dibromochloromethane	1.395 µg/L No EPA limit set worst single sample: 1.5 µg/L	4/24	SYR4	2012–2019
Fluoride	258.5 µg/L 6.5% of the EPA limit 4000 µg/L worst single sample: 260 µg/L	4/4	SYR4	2014–2017
Nitrate-Nitrite	49 µg/L 0.5% of the EPA limit 10000 µg/L worst single sample: 50 µg/L	3/6	SYR4	2012–2015
Bromodichloromethane	1.17 µg/L No EPA limit set worst single sample: 1.2 µg/L	2/24	SYR4	2012–2019
Chloroform	0.5000 µg/L No EPA limit set	2/24	SYR4	2012–2019
Combined Uranium	2.245 µg/L 7.5% of the EPA limit 30 µg/L worst single sample: 2.3 µg/L	2/14	SYR4	2013–2018
Selenium	4.545 µg/L 9.1% of the EPA limit 50 µg/L worst single sample: 4.6 µg/L	2/4	SYR4	2014–2017
Lithium	14.7 µg/L No EPA limit set	2/2	UCMR-5	2025

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, TotalBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDichloroacetic AcidDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: CONE, DERWOOD
Phone: 713-651-5151

Frequently asked questions about Harris County Mud 189

Is Harris County Mud 189 tap water safe to drink?

EPA monitoring detected 17 contaminants in Harris County Mud 189'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 Harris County Mud 189's water?

EPA monitoring detected Copper, Lead, Lead, Nitrate, Combined Radium (-226 And -228), and others. The full list with the level and data source for each is above.

How many people does Harris County Mud 189 serve?

Harris County Mud 189 reports serving 6,906 people in Texas, per its EPA record.

Has Harris County Mud 189 had any water quality violations?

The EPA has 69 violations on file for Harris County Mud 189, of which 20 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.