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Tap water quality report

City of Dayton

EPA monitoring tested this supplier for 109 contaminants and detected 14. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

109
contaminants tested
14
detected
15,393
people served
0
health-based violations
Texas rankingsLead in TexasPFAS in Texas
Water source
Ground water
Ownership
Local government
Counties served
Liberty

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
20
violations on file
2
still open
ViolationTypeStatusPeriod
MR Monitoring Unaddressed 2025-10-01
MR Monitoring Unaddressed 2025-10-01
MON Monitoring Resolved 2025-05-01 → 2025-05-31
MON Monitoring Resolved 2025-05-01 → 2025-05-31
MON Monitoring Resolved 2025-05-01 → 2025-05-31
Other Monitoring Resolved 2024-07-02
Other Monitoring Resolved 2024-07-02
Other Monitoring Resolved 2018-07-01
Other Monitoring Resolved 2018-07-01
Other Monitoring Resolved 2018-07-01

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
Nitrate
180 µg/L 1.8%
of the EPA limit 10000 µg/L
 46/46 SYR4 2012–2019
Copper
115.9 µg/L 8.9%
of the EPA limit 1300 µg/L
worst single sample: 145 µg/L
32/65 SYR4 2013–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2025
Nitrate-Nitrite
180 µg/L 1.8%
of the EPA limit 10000 µg/L
 9/9 SYR4 2012–2019
Xylenes, Total
1.54 µg/L 0%
of the EPA limit 10000 µg/L
worst single sample: 1.7 µg/L
9/20 SYR4 2012–2019
Barium
196.9 µg/L 9.8%
of the EPA limit 2000 µg/L
worst single sample: 199 µg/L
8/8 SYR4 2015–2019
Lead
16.628 µg/L 111%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 22.4 µg/L
7/65 SYR4 2013–2019
Selenium
22.71 µg/L 45%
of the EPA limit 50 µg/L
worst single sample: 23.4 µg/L
7/8 SYR4 2015–2019
Fluoride
277.5 µg/L 6.9%
of the EPA limit 4000 µg/L
worst single sample: 280 µg/L
6/6 SYR4 2012–2018
Lithium
16.5 µg/L
No EPA limit set
 4/4 UCMR-5 2023
Combined Uranium
2.79 µg/L 9.3%
of the EPA limit 30 µg/L
worst single sample: 2.8 µg/L
3/3 SYR4 2015–2017
Gross Alpha, Excl. Radon And U
2.9 pCi/L 19%
of the EPA limit 15 pCi/L
worst single sample: 3 pCi/L
3/3 SYR4 2015–2017
Arsenic
3.17 µg/L 32%
of the EPA limit 10 µg/L
worst single sample: 3.2 µg/L
2/8 SYR4 2015–2019
Combined Radium (-226 And -228)
4.2 pCi/L 84%
of the EPA limit 5 pCi/L
 1/3 SYR4 2015–2017
95 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) PhthalateDibromoacetic AcidDibromochloromethaneDichloroacetic AcidDinosebEthylene DibromideEndrinEthylbenzeneGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MUDD, MARTIN
Phone
936-258-2642
Email
mmudd@daytontx.org

Frequently asked questions about City of Dayton

Is City of Dayton tap water safe to drink?

EPA monitoring detected 14 contaminants in City of Dayton'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 Dayton's water?

EPA monitoring detected Nitrate, Copper, Lead, Nitrate-Nitrite, Xylenes, Total, and others. The full list with the level and data source for each is above.

How many people does City of Dayton serve?

City of Dayton reports serving 15,393 people in Texas, per its EPA record.

Has City of Dayton had any water quality violations?

The EPA has 20 violations on file for City of Dayton, of which 0 are health-based (a contaminant limit or required treatment was breached) and 2 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.