Is Wilmington City Tap Water Safe? Quality Report

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

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.

116

health-based violations

132

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2014-01-01 → 2014-03-31
MCL	Health-based	Resolved	2014-01-01 → 2014-03-31
MCL	Health-based	Resolved	2014-01-01 → 2014-03-31
MCL	Health-based	Resolved	2014-01-01 → 2014-03-31
MCL	Health-based	Resolved	2013-10-01 → 2013-12-31
MCL	Health-based	Resolved	2013-10-01 → 2013-12-31
MCL	Health-based	Resolved	2013-10-01 → 2013-12-31
MCL	Health-based	Resolved	2013-10-01 → 2013-12-31
TT	Health-based	Resolved	1999-01-01 → 1999-01-31
TT	Health-based	Resolved	1999-01-01 → 1999-01-31

PFAS detected

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

Contaminant	Max	Detection rate	Period
Pfba	0.0058 µg/L	1/4	2023
Pfhpa	0.0050 µg/L	1/4	2023
Pfhxa	0.0082 µg/L	1/4	2023
PFHXS	0.0070 µg/L	1/4	2023
PFOS	0.0073 µg/L	1/4	2023
Pfpea	0.0098 µg/L	1/4	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	3100 µg/L 31% of the EPA limit 10000 µg/L worst single sample: 3800 µg/L	172/192	SYR4	2012–2019
Bromodichloromethane	13.22 µg/L No EPA limit set worst single sample: 14.4 µg/L	129/129	SYR4	2012–2019
Chloroform	69.04 µg/L No EPA limit set worst single sample: 87.9 µg/L	129/129	SYR4	2012–2019
Dibromochloromethane	3.88 µg/L No EPA limit set worst single sample: 4.8 µg/L	129/129	SYR4	2012–2019
TTHM	84.34 µg/L 105% of the EPA limit, at the 95th percentile of samples — 80 µg/L worst single sample: 106 µg/L	129/129	SYR4	2012–2019
Trichloroacetic Acid	12.265 µg/L No EPA limit set worst single sample: 24.3 µg/L	128/129	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	36.17 µg/L 60% of the EPA limit 60 µg/L worst single sample: 43.9 µg/L	127/129	SYR4	2012–2019
Dichloroacetic Acid	26.34 µg/L No EPA limit set worst single sample: 33.8 µg/L	124/129	SYR4	2012–2019
Nitrate-Nitrite	3095 µg/L 31% of the EPA limit 10000 µg/L worst single sample: 3800 µg/L	83/92	SYR4	2012–2019
Lead	0.00080 mg/L 5.3% of the EPA limit 0.0150 mg/L	25/25	LCR	2025
Monochloroacetic Acid	3.8 µg/L No EPA limit set worst single sample: 4.1 µg/L	25/129	SYR4	2012–2019
Dibromoacetic Acid	5.29 µg/L No EPA limit set worst single sample: 13.4 µg/L	23/129	SYR4	2012–2019
Bromoform	0.6865 µg/L No EPA limit set worst single sample: 0.6900 µg/L	8/130	SYR4	2012–2019
Lead	35.725 µg/L 238% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 41 µg/L	6/98	SYR4	2013–2019
Atrazine	1.008 µg/L 34% of the EPA limit 3 µg/L worst single sample: 1.1 µg/L	5/22	SYR4	2012–2019
Copper	1322.05 µg/L 102% of the EPA limit, at the 95th percentile of samples — 1300 µg/L worst single sample: 1540 µg/L	4/98	SYR4	2013–2019
Monobromoacetic Acid	1.87 µg/L No EPA limit set worst single sample: 1.9 µg/L	4/129	SYR4	2012–2019
Fluoride	237 µg/L 5.9% of the EPA limit 4000 µg/L worst single sample: 240 µg/L	3/8	SYR4	2012–2019
Simazine	0.3500 µg/L 8.8% of the EPA limit 4 µg/L	1/22	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, TotalArsenicBariumBenzeneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneEthylbenzeneHfpo-DaLassoMercuryNetfosaaNfdhaNmefosaaNitritePFBSPfdaPfdoaPfeesaPfhpsPfmbaPfmpaPFNAPFOAPfpesPftaPftrdaPfunaSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: SIMPSON, ADAM
Phone: 937-382-3614
Email: [email protected]

Frequently asked questions about Wilmington City

Is Wilmington City tap water safe to drink?

EPA monitoring detected 25 contaminants in Wilmington City'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 Wilmington City's water?

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

How many people does Wilmington City serve?

Wilmington City reports serving 12,401 people in Ohio, per its EPA record.

Has Wilmington City had any water quality violations?

The EPA has 132 violations on file for Wilmington City, of which 116 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.