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Tap water quality report

Cnp Utility District

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
14,718
people served
4
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.

4
health-based violations
4
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2003-08-01 → 2003-08-31
MCL Health-based Resolved 2003-08-01 → 2003-08-31
MCL Health-based Resolved 2003-08-01 → 2003-08-31
MCL Health-based Resolved 2003-08-01 → 2003-08-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Pfba 0.0072 µg/L 3/8 2025
Pfhxa 0.0044 µg/L 1/8 2025
Pfpea 0.0061 µg/L 1/8 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
2390 µg/L 184%
of the EPA limit, in the worst sample — 1300 µg/L
 153/216 SYR4 2012–2019
Chloroform
34.6 µg/L
No EPA limit set
 104/117 SYR4 2012–2019
Bromodichloromethane
5.1 µg/L
No EPA limit set
 98/117 SYR4 2012–2019
TTHM
40.8 µg/L 51%
of the EPA limit 80 µg/L
 91/102 SYR4 2012–2019
Dichloroacetic Acid
28.6 µg/L
No EPA limit set
 90/102 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
35.4 µg/L 59%
of the EPA limit 60 µg/L
 90/102 SYR4 2012–2019
Trichloroacetic Acid
4.1 µg/L
No EPA limit set
 85/102 SYR4 2012–2019
Lead
118 µg/L 787%
of the EPA limit, in the worst sample — 15 µg/L
 64/216 SYR4 2012–2019
Nitrate
1750 µg/L 18%
of the EPA limit 10000 µg/L
 40/46 SYR4 2012–2019
Monochloroacetic Acid
10.8 µg/L
No EPA limit set
 28/102 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 17/17 LCR 2025
Atrazine
0.8600 µg/L 29%
of the EPA limit 3 µg/L
 13/18 SYR4 2012–2019
Barium
283 µg/L 14%
of the EPA limit 2000 µg/L
 8/8 SYR4 2012–2019
Fluoride
650 µg/L 16%
of the EPA limit 4000 µg/L
 7/7 SYR4 2012–2018
Nitrate-Nitrite
1770 µg/L 18%
of the EPA limit 10000 µg/L
 7/8 SYR4 2012–2015
Dibromoacetic Acid
1.6 µg/L
No EPA limit set
 5/102 SYR4 2012–2019
Dibromochloromethane
1.4 µg/L
No EPA limit set
 5/117 SYR4 2012–2019
Simazine
0.2700 µg/L 6.8%
of the EPA limit 4 µg/L
 4/18 SYR4 2012–2019
Lithium
34.7 µg/L
No EPA limit set
 4/8 UCMR-5 2025
Arsenic
8.4 µg/L 84%
of the EPA limit 10 µg/L
 3/8 SYR4 2012–2019
Combined Radium (-226 And -228)
2.8 pCi/L 56%
of the EPA limit 5 pCi/L
 3/3 SYR4 2012–2014
Gross Beta Particle Activity
6.1 pCi/L
No EPA limit set
 3/5 SYR4 2012–2018
Nitrite
20 µg/L 2%
of the EPA limit 1000 µg/L
 3/8 SYR4 2012–2015
Bromoform
1.3 µg/L
No EPA limit set
 2/117 SYR4 2012–2019
Cyanide
110 µg/L 55%
of the EPA limit 200 µg/L
 2/6 SYR4 2014–2017
Di(2-ethylhexyl) Phthalate
0.7800 µg/L 13%
of the EPA limit 6 µg/L
 2/18 SYR4 2012–2019
Gross Alpha, Excl. Radon And U
4.8 pCi/L 32%
of the EPA limit 15 pCi/L
 2/4 SYR4 2014–2018
Combined Uranium
1.2 µg/L 4%
of the EPA limit 30 µg/L
 1/4 SYR4 2014–2018
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) AdipateDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
GRANBERRY, RENEE, S
Phone
713-942-9922

Frequently asked questions about Cnp Utility District

Is Cnp Utility District tap water safe to drink?

EPA monitoring detected 31 contaminants in Cnp Utility District'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 Cnp Utility District's water?

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

How many people does Cnp Utility District serve?

Cnp Utility District reports serving 14,718 people in Texas, per its EPA record.

Has Cnp Utility District had any water quality violations?

The EPA has 4 violations on file for Cnp Utility District, of which 4 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.