Tap WaterIndex

← Texas

Tap water quality report

Harris County Fwsd 51

EPA monitoring tested this supplier for 108 contaminants and detected 28. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

108
contaminants tested
28
detected
19,671
people served
6
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.

6
health-based violations
13
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2014-12-01 → 2014-12-31
MCL Health-based Resolved 2014-12-01 → 2014-12-31
MCL Health-based Resolved 2014-12-01 → 2014-12-31
MCL Health-based Resolved 2014-12-01 → 2014-12-31
MCL Health-based Archived 1993-11-01 → 1993-11-30
MCL Health-based Archived 1993-08-01 → 1993-08-31
RPT Monitoring Resolved 2025-07-02
RPT Monitoring Resolved 2025-07-02
Other Monitoring Resolved 2015-07-01
Other Monitoring Resolved 2015-07-01

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Pfhxa 0.0048 µg/L 4/8 2025
Pfpea 0.0055 µg/L 4/8 2025
Pfba 0.0072 µg/L 3/8 2025
PFBS 0.0035 µg/L 2/8 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 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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Bromodichloromethane
13.12 µg/L
No EPA limit set
worst single sample: 18.3 µg/L
137/138 SYR4 2012–2019
Chloroform
30.7 µg/L
No EPA limit set
worst single sample: 37.7 µg/L
137/138 SYR4 2012–2019
Dichloroacetic Acid
31.15 µg/L
No EPA limit set
worst single sample: 37.8 µg/L
127/128 SYR4 2012–2019
TTHM
42.44 µg/L 53%
of the EPA limit 80 µg/L
worst single sample: 55.6 µg/L
127/128 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
47.94 µg/L 80%
of the EPA limit 60 µg/L
worst single sample: 57.1 µg/L
127/128 SYR4 2012–2019
Trichloroacetic Acid
10.5 µg/L
No EPA limit set
worst single sample: 13.1 µg/L
126/128 SYR4 2012–2019
Dibromochloromethane
4.8 µg/L
No EPA limit set
worst single sample: 7 µg/L
114/138 SYR4 2012–2019
Copper
192.75 µg/L 15%
of the EPA limit 1300 µg/L
worst single sample: 440 µg/L
76/125 SYR4 2013–2017
Dibromoacetic Acid
2.19 µg/L
No EPA limit set
worst single sample: 2.7 µg/L
75/128 SYR4 2012–2019
Lead
11.22 µg/L 75%
of the EPA limit 15 µg/L
worst single sample: 37 µg/L
73/125 SYR4 2013–2017
Nitrate
785.5 µg/L 7.9%
of the EPA limit 10000 µg/L
worst single sample: 890 µg/L
32/32 SYR4 2012–2019
Monochloroacetic Acid
8.38 µg/L
No EPA limit set
worst single sample: 12.6 µg/L
24/128 SYR4 2012–2019
Atrazine
0.4650 µg/L 16%
of the EPA limit 3 µg/L
worst single sample: 0.7500 µg/L
16/19 SYR4 2012–2019
Lead
0.0016 mg/L 11%
of the EPA limit 0.0150 mg/L
 16/16 LCR 2023
Simazine
0.1800 µg/L 4.5%
of the EPA limit 4 µg/L
worst single sample: 0.2100 µg/L
16/19 SYR4 2012–2019
Nitrate-Nitrite
410 µg/L 4.1%
of the EPA limit 10000 µg/L
 6/6 SYR4 2012–2015
Barium
54.38 µg/L 2.7%
of the EPA limit 2000 µg/L
worst single sample: 56.5 µg/L
5/5 SYR4 2014–2019
Bromoform
1.6 µg/L
No EPA limit set
 4/138 SYR4 2012–2019
Fluoride
666.5 µg/L 17%
of the EPA limit 4000 µg/L
worst single sample: 680 µg/L
4/4 SYR4 2014–2017
Cyanide
139 µg/L 70%
of the EPA limit 200 µg/L
worst single sample: 140 µg/L
2/4 SYR4 2014–2017
Gross Beta Particle Activity
5.4 pCi/L
No EPA limit set
 2/2 SYR4 2017
Hexachlorocyclopentadiene
0.2245 µg/L 0.4%
of the EPA limit 50 µg/L
worst single sample: 0.2300 µg/L
2/19 SYR4 2012–2019
Nitrite
10 µg/L 1%
of the EPA limit 1000 µg/L
 2/6 SYR4 2012–2015
Lithium
11.7 µg/L
No EPA limit set
 1/8 UCMR-5 2025
80 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, TotalArsenicAsbestosBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneGross Alpha, Excl. Radon And UHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaOxamylPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
DOMINY, JERRY
Phone
713-860-6400

Frequently asked questions about Harris County Fwsd 51

Is Harris County Fwsd 51 tap water safe to drink?

EPA monitoring detected 28 contaminants in Harris County Fwsd 51'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 Fwsd 51's water?

EPA monitoring detected Bromodichloromethane, Chloroform, Dichloroacetic Acid, TTHM, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.

How many people does Harris County Fwsd 51 serve?

Harris County Fwsd 51 reports serving 19,671 people in Texas, per its EPA record.

Has Harris County Fwsd 51 had any water quality violations?

The EPA has 13 violations on file for Harris County Fwsd 51, of which 6 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.