Is Harris County Mud 365 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
Other	Monitoring	Unaddressed	2025-02-03
MR	Monitoring	Resolved	2023-12-02
MR	Monitoring	Resolved	2023-12-02
MR	Monitoring	Resolved	2023-12-02
MR	Monitoring	Resolved	2014-12-30
MR	Monitoring	Resolved	2014-12-30

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 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	482.8 µg/L 37% of the EPA limit 1300 µg/L worst single sample: 560 µg/L	37/43	SYR4	2014–2017
Nitrate	20 µg/L 0.2% of the EPA limit 10000 µg/L	16/26	SYR4	2012–2019
Dibromochloromethane	8.49 µg/L No EPA limit set worst single sample: 10.8 µg/L	12/23	SYR4	2014–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	11/11	LCR	2023
Bromoform	4.25 µg/L No EPA limit set worst single sample: 4.7 µg/L	10/23	SYR4	2014–2019
Bromodichloromethane	13.33 µg/L No EPA limit set worst single sample: 15.4 µg/L	7/23	SYR4	2014–2019
TTHM	60.7 µg/L 76% of the EPA limit 80 µg/L worst single sample: 66.4 µg/L	7/12	SYR4	2014–2019
Lead	2.975 µg/L 20% of the EPA limit 15 µg/L worst single sample: 3.3 µg/L	6/43	SYR4	2014–2017
Chloroform	44.1 µg/L No EPA limit set worst single sample: 48.9 µg/L	5/23	SYR4	2014–2019
Dichloroacetic Acid	3.54 µg/L No EPA limit set worst single sample: 3.7 µg/L	5/12	SYR4	2014–2019
Total Haloacetic Acids (HAA5)	5.02 µg/L 8.4% of the EPA limit 60 µg/L worst single sample: 5.3 µg/L	5/12	SYR4	2014–2019
Barium	255.6 µg/L 13% of the EPA limit 2000 µg/L worst single sample: 258 µg/L	4/4	SYR4	2014–2019
Fluoride	498.5 µg/L 12% of the EPA limit 4000 µg/L worst single sample: 500 µg/L	4/4	SYR4	2014–2019
Gross Alpha, Excl. Radon And U	6.11 pCi/L 41% of the EPA limit 15 pCi/L worst single sample: 6.3 pCi/L	3/3	SYR4	2016–2019
Nitrate-Nitrite	10 µg/L 0.1% of the EPA limit 10000 µg/L	3/4	SYR4	2012–2015
Combined Radium (-226 And -228)	2.5145 pCi/L 50% of the EPA limit 5 pCi/L worst single sample: 2.59 pCi/L	2/3	SYR4	2016–2019
Di(2-ethylhexyl) Phthalate	1.656 µg/L 28% of the EPA limit 6 µg/L worst single sample: 1.7 µg/L	2/10	SYR4	2014–2019
Dibromoacetic Acid	1.475 µg/L No EPA limit set worst single sample: 1.5 µg/L	2/12	SYR4	2014–2019
Gross Beta Particle Activity	7.695 pCi/L No EPA limit set worst single sample: 7.8 pCi/L	2/3	SYR4	2016–2019
Lithium	35.6 µg/L No EPA limit set	2/2	UCMR-5	2025
Trichloroacetic Acid	1.6 µg/L No EPA limit set	1/12	SYR4	2014–2019
Xylenes, Total	0.6000 µg/L 0% of the EPA limit 10000 µg/L	1/11	SYR4	2015–2019

87 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, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: COLEMAN, GREG
Phone: 713-860-6400

Frequently asked questions about Harris County Mud 365

Is Harris County Mud 365 tap water safe to drink?

EPA monitoring detected 22 contaminants in Harris County Mud 365'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 365's water?

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

How many people does Harris County Mud 365 serve?

Harris County Mud 365 reports serving 4,461 people in Texas, per its EPA record.

Has Harris County Mud 365 had any water quality violations?

The EPA has 6 violations on file for Harris County Mud 365, of which 0 are health-based (a contaminant limit or required treatment was breached) and 1 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.