Tap WaterIndex

← Texas

Tap water quality report

Harris County Mud 391

EPA monitoring tested this supplier for 109 contaminants and detected 22. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

109
contaminants tested
22
detected
8,835
people served
0
health-based violations
Texas rankingsLead in TexasPFAS in Texas
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.

0
health-based violations
14
violations on file
0
still open
ViolationTypeStatusPeriod
Other Monitoring Resolved 2006-04-01
MR Monitoring Resolved 2005-12-01 → 2005-12-31
MR Monitoring Resolved 2005-12-01 → 2005-12-31
MR Monitoring Resolved 2005-12-01 → 2005-12-31
MR Monitoring Resolved 2005-12-01 → 2005-12-31
MR Monitoring Resolved 2005-10-01 → 2005-10-31
MR Monitoring Resolved 2005-10-01 → 2005-10-31
MR Monitoring Resolved 2005-10-01 → 2005-10-31
MR Monitoring Resolved 2005-10-01 → 2005-10-31
Other Monitoring Resolved 2003-05-01

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
252 µg/L 19%
of the EPA limit 1300 µg/L
 30/44 SYR4 2012–2017
Nitrate
40 µg/L 0.4%
of the EPA limit 10000 µg/L
 16/28 SYR4 2012–2019
Lead
2.1 µg/L 14%
of the EPA limit 15 µg/L
 12/44 SYR4 2012–2017
Dibromochloromethane
3.9 µg/L
No EPA limit set
 10/20 SYR4 2012–2019
Lead
0.00073 mg/L 4.9%
of the EPA limit 0.0150 mg/L
 8/8 LCR 2023
Bromoform
6.7 µg/L
No EPA limit set
 7/20 SYR4 2012–2019
Arsenic
4.7 µg/L 47%
of the EPA limit 10 µg/L
 6/6 SYR4 2012–2019
Barium
269 µg/L 13%
of the EPA limit 2000 µg/L
 6/6 SYR4 2012–2019
Fluoride
900 µg/L 23%
of the EPA limit 4000 µg/L
 6/6 SYR4 2013–2019
Bromodichloromethane
1.7 µg/L
No EPA limit set
 5/20 SYR4 2012–2019
TTHM
6.3 µg/L 7.9%
of the EPA limit 80 µg/L
 4/7 SYR4 2012–2019
Lithium
36.8 µg/L
No EPA limit set
 4/4 UCMR-5 2025
Xylenes, Total
5.7 µg/L 0.1%
of the EPA limit 10000 µg/L
 3/14 SYR4 2012–2019
Combined Uranium
1.5 µg/L 5%
of the EPA limit 30 µg/L
 2/4 SYR4 2014–2019
Ethylbenzene
0.8000 µg/L 0.1%
of the EPA limit 700 µg/L
 2/14 SYR4 2012–2019
Gross Alpha, Excl. Radon And U
3 pCi/L 20%
of the EPA limit 15 pCi/L
 2/4 SYR4 2014–2019
Nitrate-Nitrite
40 µg/L 0.4%
of the EPA limit 10000 µg/L
 2/4 SYR4 2012–2015
Combined Radium (-226 And -228)
1.5 pCi/L 30%
of the EPA limit 5 pCi/L
 1/2 SYR4 2015–2016
Dibromoacetic Acid
1.2 µg/L
No EPA limit set
 1/7 SYR4 2012–2019
Gross Beta Particle Activity
4 pCi/L
No EPA limit set
 1/4 SYR4 2014–2019
Selenium
8 µg/L 16%
of the EPA limit 50 µg/L
 1/6 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
1.2 µg/L 2%
of the EPA limit 60 µg/L
 1/7 SYR4 2012–2019
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, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDichloroacetic AcidDinosebEthylene DibromideEndrinHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
PORTER, GEORGE
Phone
713-860-6400

Frequently asked questions about Harris County Mud 391

Is Harris County Mud 391 tap water safe to drink?

EPA monitoring detected 22 contaminants in Harris County Mud 391'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 391's water?

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

How many people does Harris County Mud 391 serve?

Harris County Mud 391 reports serving 8,835 people in Texas, per its EPA record.

Has Harris County Mud 391 had any water quality violations?

The EPA has 14 violations on file for Harris County Mud 391, 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.