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Tap water quality report

Northwest Harris County Mud 12

EPA monitoring tested this supplier for 109 contaminants and detected 18. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

109
contaminants tested
18
detected
7,764
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
11
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Archived 2024-01-01 → 2024-06-30
MR Monitoring Archived 2024-01-01 → 2024-06-30
MR Monitoring Archived 2024-01-01 → 2024-06-30
MR Monitoring Archived 2024-01-01 → 2024-06-30
MR Monitoring Archived 2024-01-01 → 2024-06-30
MR Monitoring Resolved 2008-10-01 → 2008-12-31
MR Monitoring Resolved 2008-10-01 → 2008-12-31
MR Monitoring Resolved 2008-10-01 → 2008-12-31
Other Monitoring Resolved 2005-07-01
Other Monitoring Resolved 2004-01-01

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Pfhxa 0.0036 µg/L 1/2 2023
Pfpea 0.0050 µg/L 1/2 2023

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
341 µg/L 26%
of the EPA limit 1300 µg/L
 20/21 SYR4 2015–2019
Nitrate
210 µg/L 2.1%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Lead
0.0014 mg/L 9.3%
of the EPA limit 0.0150 mg/L
 9/9 LCR 2024
Lead
1.57 µg/L 10%
of the EPA limit 15 µg/L
 7/21 SYR4 2015–2019
Combined Radium (-226 And -228)
2.02 pCi/L 40%
of the EPA limit 5 pCi/L
 3/3 SYR4 2012–2018
Fluoride
210 µg/L 5.3%
of the EPA limit 4000 µg/L
 3/3 SYR4 2012–2018
Gross Beta Particle Activity
5.8 pCi/L
No EPA limit set
 3/3 SYR4 2012–2018
Nitrate-Nitrite
210 µg/L 2.1%
of the EPA limit 10000 µg/L
 3/3 SYR4 2013–2019
Arsenic
2.9 µg/L 29%
of the EPA limit 10 µg/L
 2/2 SYR4 2015–2018
Barium
196 µg/L 9.8%
of the EPA limit 2000 µg/L
 2/2 SYR4 2015–2018
Combined Uranium
7.8 µg/L 26%
of the EPA limit 30 µg/L
 2/2 SYR4 2015–2018
Gross Alpha, Excl. Radon And U
7 pCi/L 47%
of the EPA limit 15 pCi/L
 2/2 SYR4 2015–2018
Selenium
6.1 µg/L 12%
of the EPA limit 50 µg/L
 2/2 SYR4 2015–2018
Lithium
16 µg/L
No EPA limit set
 2/2 UCMR-5 2023
Dibromoacetic Acid
1.1 µg/L
No EPA limit set
 1/7 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
1.1 µg/L 1.8%
of the EPA limit 60 µg/L
 1/7 SYR4 2013–2019
91 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, TotalBromodichloromethaneBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDichloroacetic AcidDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
SULLIVAN, MARY, JOAN
Phone
281-855-2172

Frequently asked questions about Northwest Harris County Mud 12

Is Northwest Harris County Mud 12 tap water safe to drink?

EPA monitoring detected 18 contaminants in Northwest Harris County Mud 12'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 12's water?

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

How many people does Northwest Harris County Mud 12 serve?

Northwest Harris County Mud 12 reports serving 7,764 people in Texas, per its EPA record.

Has Northwest Harris County Mud 12 had any water quality violations?

The EPA has 11 violations on file for Northwest Harris County Mud 12, 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.