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Tap water quality report

Chimney Hill Mud

EPA monitoring tested this supplier for 109 contaminants and detected 31. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

109
contaminants tested
31
detected
5,409
people served
2
health-based violations
Texas rankingsLead in TexasPFAS in Texas
Water source
SWP
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.

2
health-based violations
10
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 1984-02-14 → 1985-02-13
MCL Health-based Archived 1984-02-14 → 1985-02-13
MR Monitoring Resolved 2013-12-30
Other Monitoring Resolved 2011-03-11
Other Monitoring Resolved 2011-03-11
Other Monitoring Resolved 2009-12-21
MR Monitoring Resolved 2009-08-01 → 2009-08-31
MR Monitoring Resolved 2009-08-01 → 2009-08-31
MR Monitoring Resolved 2009-08-01 → 2009-08-31
MR Monitoring Resolved 1992-07-01 → 1993-06-30

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Pfba 0.0050 µg/L 1/3 2025
Pfhxa 0.0040 µg/L 1/3 2025
Pfpea 0.0042 µg/L 1/3 2025

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
1010 µg/L 78%
of the EPA limit 1300 µg/L
 88/101 SYR4 2013–2019
Lead
82.4 µg/L 549%
of the EPA limit, in the worst sample — 15 µg/L
 60/101 SYR4 2013–2019
Chloroform
28.5 µg/L
No EPA limit set
 49/67 SYR4 2012–2019
Bromodichloromethane
12.2 µg/L
No EPA limit set
 48/67 SYR4 2012–2019
TTHM
39.1 µg/L 49%
of the EPA limit 80 µg/L
 48/62 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
34.6 µg/L 58%
of the EPA limit 60 µg/L
 48/62 SYR4 2012–2019
Dichloroacetic Acid
25.5 µg/L
No EPA limit set
 47/62 SYR4 2012–2019
Dibromochloromethane
5.5 µg/L
No EPA limit set
 44/67 SYR4 2012–2019
Trichloroacetic Acid
10.1 µg/L
No EPA limit set
 44/62 SYR4 2012–2019
Dibromoacetic Acid
3.2 µg/L
No EPA limit set
 37/62 SYR4 2012–2019
Nitrate
1060 µg/L 11%
of the EPA limit 10000 µg/L
 32/32 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 18/18 LCR 2025
Bromoform
2.6 µg/L
No EPA limit set
 10/67 SYR4 2012–2019
Monochloroacetic Acid
8.8 µg/L
No EPA limit set
 7/62 SYR4 2012–2019
Nitrate-Nitrite
1340 µg/L 13%
of the EPA limit 10000 µg/L
 7/7 SYR4 2012–2015
Nitrite
280 µg/L 28%
of the EPA limit 1000 µg/L
 5/7 SYR4 2012–2015
Atrazine
0.2800 µg/L 9.3%
of the EPA limit 3 µg/L
 4/8 SYR4 2012–2019
Simazine
0.1800 µg/L 4.5%
of the EPA limit 4 µg/L
 3/8 SYR4 2012–2019
Arsenic
6.1 µg/L 61%
of the EPA limit 10 µg/L
 2/2 SYR4 2016–2019
Barium
190 µg/L 9.5%
of the EPA limit 2000 µg/L
 2/2 SYR4 2016–2019
Combined Radium (-226 And -228)
1.01 pCi/L 20%
of the EPA limit 5 pCi/L
 2/2 SYR4 2013–2019
Fluoride
520 µg/L 13%
of the EPA limit 4000 µg/L
 2/2 SYR4 2014–2017
Gross Beta Particle Activity
5.7 pCi/L
No EPA limit set
 2/3 SYR4 2012–2019
Selenium
5.3 µg/L 11%
of the EPA limit 50 µg/L
 2/2 SYR4 2016–2019
Lithium
17.9 µg/L
No EPA limit set
 2/3 UCMR-5 2025
Cyanide
90 µg/L 45%
of the EPA limit 200 µg/L
 1/2 SYR4 2014–2017
Combined Uranium
2 µg/L 6.7%
of the EPA limit 30 µg/L
 1/1 SYR4 2019
Gross Alpha, Excl. Radon And U
3 pCi/L 20%
of the EPA limit 15 pCi/L
 1/1 SYR4 2019
78 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-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
SZINYEI, W, JAY
Phone
713-651-0111

Frequently asked questions about Chimney Hill Mud

Is Chimney Hill Mud tap water safe to drink?

EPA monitoring detected 31 contaminants in Chimney Hill Mud'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 Chimney Hill Mud's water?

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

How many people does Chimney Hill Mud serve?

Chimney Hill Mud reports serving 5,409 people in Texas, per its EPA record.

Has Chimney Hill Mud had any water quality violations?

The EPA has 10 violations on file for Chimney Hill Mud, of which 2 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.