Is Dayton Public Water Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Local government
Counties served: Montgomery

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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Resolved	2009-05-01 → 2009-05-31
TT	Health-based	Resolved	2009-05-01 → 2009-05-31
TT	Health-based	Resolved	2009-05-01 → 2009-05-31
MCL	Health-based	Resolved	1992-09-01 → 1992-09-30
MCL	Health-based	Resolved	1992-09-01 → 1992-09-30
MCL	Health-based	Resolved	1992-09-01 → 1992-09-30
MCL	Health-based	Resolved	1992-09-01 → 1992-09-30
MCL	Health-based	Resolved	1992-09-01 → 1992-09-30
MCL	Health-based	Resolved	1992-07-01 → 1992-07-31
MCL	Health-based	Resolved	1992-07-01 → 1992-07-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).

Contaminant	Max	Detection rate	Period
Pfhxa	0.0044 µg/L	4/8	2023
PFHXS	0.0098 µg/L	4/8	2023
PFOS	0.0100 µg/L	4/8	2023
Pfpea	0.0046 µg/L	4/8	2023
PFBS	0.0030 µg/L	1/8	2023

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Nitrate	1567.5 µg/L 16% of the EPA limit 10000 µg/L worst single sample: 1900 µg/L	516/520	SYR4	2012–2019
Bromodichloromethane	10.8745 µg/L No EPA limit set worst single sample: 13.542 µg/L	266/266	SYR4	2012–2019
Chloroform	11.7683 µg/L No EPA limit set worst single sample: 19.635 µg/L	266/266	SYR4	2012–2019
Dibromochloromethane	9.35075 µg/L No EPA limit set worst single sample: 13.045 µg/L	266/266	SYR4	2012–2019
Bromoform	2.747 µg/L No EPA limit set worst single sample: 5.837 µg/L	211/266	SYR4	2012–2019
TTHM	36.7688 µg/L 46% of the EPA limit 80 µg/L worst single sample: 46.875 µg/L	197/197	SYR4	2012–2019
Dichloroacetic Acid	4.2 µg/L No EPA limit set worst single sample: 5.9 µg/L	165/168	SYR4	2012–2019
Dibromoacetic Acid	3.5025 µg/L No EPA limit set worst single sample: 5.8 µg/L	151/168	SYR4	2012–2019
Nitrate-Nitrite	1472 µg/L 15% of the EPA limit 10000 µg/L worst single sample: 1790 µg/L	147/148	SYR4	2012–2019
Copper	68.23 µg/L 5.2% of the EPA limit 1300 µg/L worst single sample: 190 µg/L	74/506	SYR4	2012–2017
Total Haloacetic Acids (HAA5)	8.6065 µg/L 14% of the EPA limit 60 µg/L worst single sample: 21.3 µg/L	71/168	SYR4	2012–2019
Trichloroacetic Acid	1.51425 µg/L No EPA limit set worst single sample: 4.4 µg/L	38/168	SYR4	2012–2019
Lead	11.2 µg/L 75% of the EPA limit 15 µg/L worst single sample: 13.9 µg/L	34/500	SYR4	2012–2017
Barium	67.1 µg/L 3.4% of the EPA limit 2000 µg/L worst single sample: 94.2 µg/L	31/33	SYR4	2012–2019
Lead	0.4700 mg/L 3133% above the EPA limit of 0.0150 mg/L	24/24	LCR	2026
Fluoride	977.5 µg/L 24% of the EPA limit 4000 µg/L worst single sample: 1000 µg/L	16/16	SYR4	2012–2019
Gross Beta Particle Activity	17.2 pCi/L No EPA limit set worst single sample: 20 pCi/L	5/12	SYR4	2014–2019
Monobromoacetic Acid	2.38 µg/L No EPA limit set worst single sample: 2.5 µg/L	3/168	SYR4	2012–2019
Monochloroacetic Acid	3.65 µg/L No EPA limit set worst single sample: 3.7 µg/L	2/168	SYR4	2012–2019
cis-1,2-Dichloroethylene	0.6665 µg/L 1% of the EPA limit 70 µg/L worst single sample: 0.6730 µg/L	2/98	SYR4	2012–2019
Combined Radium (-226 And -228)	1.3 pCi/L 26% of the EPA limit 5 pCi/L	1/1	SYR4	2019
Nitrite	186 µg/L 19% of the EPA limit 1000 µg/L	1/169	SYR4	2012–2019
Trichloroethylene	1.063 µg/L 21% of the EPA limit 5 µg/L	1/98	SYR4	2012–2019

57 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAtrazineBenzeneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneEthylbenzeneHfpo-DaLassoMercuryNetfosaaNfdhaNmefosaaPfbaPfdaPfdoaPfeesaPfhpaPfhpsPfmbaPfmpaPFNAPFOAPfpesPftaPftrdaPfunaSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)Vinyl ChlorideXylenes, TotalLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: BAYLESS, MIYAH
Phone: 937-333-6099
Email: [email protected]

Frequently asked questions about Dayton Public Water

Is Dayton Public Water tap water safe to drink?

EPA monitoring detected 28 contaminants in Dayton Public Water'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 Dayton Public Water's water?

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

How many people does Dayton Public Water serve?

Dayton Public Water reports serving 141,407 people in Ohio, per its EPA record.

Has Dayton Public Water had any water quality violations?

The EPA has 45 violations on file for Dayton Public Water, of which 13 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.