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Tap water quality report

City of Dilley

EPA monitoring tested this supplier for 109 contaminants and detected 19. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

109
contaminants tested
19
detected
4,505
people served
7
health-based violations
Texas rankingsLead in TexasPFAS in Texas
Water source
Ground water
Ownership
Local government
Counties served
Frio

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.

7
health-based violations
51
violations on file
6
still open
ViolationTypeStatusPeriod
TT Health-based Unaddressed 2024-10-17
TT Health-based Unaddressed 2024-10-17
TT Health-based Unaddressed 2024-10-17
TT Health-based Resolved 2024-02-24
TT Health-based Resolved 2024-02-24
TT Health-based Resolved 2024-02-24
TT Health-based Resolved 2024-02-24
Other Monitoring Resolved 2025-07-01
Other Monitoring Resolved 2025-07-01
Other Monitoring Resolved 2025-05-01

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 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
Copper
136.35 µg/L 10%
of the EPA limit 1300 µg/L
worst single sample: 250 µg/L
74/82 SYR4 2016–2018
Nitrate
228.5 µg/L 2.3%
of the EPA limit 10000 µg/L
worst single sample: 230 µg/L
24/24 SYR4 2012–2019
Dibromochloromethane
5.18 µg/L
No EPA limit set
worst single sample: 6.7 µg/L
17/20 SYR4 2013–2019
Bromoform
4.96 µg/L
No EPA limit set
worst single sample: 5.4 µg/L
12/20 SYR4 2013–2019
Lead
0.00050 mg/L 3.3%
of the EPA limit 0.0150 mg/L
 12/12 LCR 2024
Lead
2.19 µg/L 15%
of the EPA limit 15 µg/L
worst single sample: 2.4 µg/L
7/82 SYR4 2016–2018
Bromodichloromethane
5.325 µg/L
No EPA limit set
worst single sample: 6.3 µg/L
6/20 SYR4 2013–2019
TTHM
20.775 µg/L 26%
of the EPA limit 80 µg/L
worst single sample: 23.5 µg/L
6/8 SYR4 2013–2019
Gross Beta Particle Activity
7.21 pCi/L
No EPA limit set
worst single sample: 7.6 pCi/L
4/4 SYR4 2013–2019
Nitrate-Nitrite
228.5 µg/L 2.3%
of the EPA limit 10000 µg/L
worst single sample: 230 µg/L
4/4 SYR4 2012–2015
Total Haloacetic Acids (HAA5)
1.6 µg/L 2.7%
of the EPA limit 60 µg/L
 4/8 SYR4 2013–2019
Lithium
41.4 µg/L
No EPA limit set
 4/4 UCMR-5 2023
Barium
102.8 µg/L 5.1%
of the EPA limit 2000 µg/L
worst single sample: 103 µg/L
3/3 SYR4 2016–2019
Chloroform
5.43 µg/L
No EPA limit set
worst single sample: 5.9 µg/L
3/20 SYR4 2013–2019
Dibromoacetic Acid
1.6 µg/L
No EPA limit set
 3/8 SYR4 2013–2019
Fluoride
519 µg/L 13%
of the EPA limit 4000 µg/L
worst single sample: 520 µg/L
3/3 SYR4 2014–2017
Combined Radium (-226 And -228)
4.6 pCi/L 92%
of the EPA limit 5 pCi/L
worst single sample: 4.7 pCi/L
2/2 SYR4 2013–2019
Dichloromethane
8.8 µg/L 176%
of the EPA limit, at the 95th percentile of samples — 5 µg/L
 1/12 SYR4 2014–2019
Dichloroacetic Acid
1 µg/L
No EPA limit set
 1/8 SYR4 2013–2019
90 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, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneGross Alpha, Excl. Radon And UHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
INOCENCIO, ALEXANDRIA
Phone
830-965-1624
Email
alexandria.inocencio@cityofdilleytx.com

Frequently asked questions about City of Dilley

Is City of Dilley tap water safe to drink?

EPA monitoring detected 19 contaminants in City of Dilley'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 City of Dilley's water?

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

How many people does City of Dilley serve?

City of Dilley reports serving 4,505 people in Texas, per its EPA record.

Has City of Dilley had any water quality violations?

The EPA has 51 violations on file for City of Dilley, of which 7 are health-based (a contaminant limit or required treatment was breached) and 6 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.