Is Westerville City Tap Water Safe? Quality Report

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

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
MCL	Health-based	Resolved	2016-01-01 → 2016-03-31
MCL	Health-based	Resolved	2016-01-01 → 2016-03-31
MCL	Health-based	Resolved	2016-01-01 → 2016-03-31
MCL	Health-based	Resolved	2016-01-01 → 2016-03-31
MCL	Health-based	Resolved	2015-10-01 → 2015-12-31
MCL	Health-based	Resolved	2015-10-01 → 2015-12-31
MCL	Health-based	Resolved	2015-10-01 → 2015-12-31
MCL	Health-based	Resolved	2015-10-01 → 2015-12-31
MCL	Health-based	Resolved	2015-07-01 → 2015-09-30
MCL	Health-based	Resolved	2015-07-01 → 2015-09-30

PFAS detected

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

Contaminant	Max	Detection rate	Period
Pfba	0.0056 µg/L	1/4	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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Nitrate	1300 µg/L 13% of the EPA limit 10000 µg/L worst single sample: 1640 µg/L	190/192	SYR4	2012–2019
Chloroform	64.075 µg/L No EPA limit set worst single sample: 104 µg/L	146/146	SYR4	2012–2019
Dibromochloromethane	11.49 µg/L No EPA limit set worst single sample: 13.4 µg/L	146/146	SYR4	2012–2019
Bromodichloromethane	21.86 µg/L No EPA limit set worst single sample: 29.6 µg/L	145/145	SYR4	2012–2019
TTHM	96.47 µg/L 121% of the EPA limit, at the 95th percentile of samples — 80 µg/L worst single sample: 146 µg/L	140/140	SYR4	2012–2019
Dichloroacetic Acid	33.345 µg/L No EPA limit set worst single sample: 39.5 µg/L	138/138	SYR4	2012–2019
Trichloroacetic Acid	18.875 µg/L No EPA limit set worst single sample: 30.9 µg/L	134/139	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	55.38 µg/L 92% of the EPA limit 60 µg/L worst single sample: 80.3 µg/L	133/139	SYR4	2012–2019
Dibromoacetic Acid	3.0943 µg/L No EPA limit set worst single sample: 5.15 µg/L	127/135	SYR4	2012–2019
Bromoform	2.729 µg/L No EPA limit set worst single sample: 3.35 µg/L	103/147	SYR4	2012–2019
Nitrate-Nitrite	1300 µg/L 13% of the EPA limit 10000 µg/L worst single sample: 1640 µg/L	93/95	SYR4	2012–2019
Copper	67.65 µg/L 5.2% of the EPA limit 1300 µg/L worst single sample: 148 µg/L	90/142	SYR4	2013–2019
Monochloroacetic Acid	6.378 µg/L No EPA limit set worst single sample: 21.3 µg/L	27/139	SYR4	2012–2019
Lead	0.0015 mg/L 10% of the EPA limit 0.0150 mg/L	20/20	LCR	2023
Lead	14.08 µg/L 94% of the EPA limit 15 µg/L worst single sample: 16.5 µg/L	12/142	SYR4	2013–2019
Monobromoacetic Acid	3.27 µg/L No EPA limit set worst single sample: 4.51 µg/L	11/139	SYR4	2012–2019
Fluoride	975.25 µg/L 24% of the EPA limit 4000 µg/L worst single sample: 991 µg/L	8/8	SYR4	2012–2019
Atrazine	0.5340 µg/L 18% of the EPA limit 3 µg/L worst single sample: 0.6000 µg/L	7/25	SYR4	2012–2019
Barium	19.64 µg/L 1% of the EPA limit 2000 µg/L worst single sample: 19.7 µg/L	7/8	SYR4	2012–2019
Simazine	0.1900 µg/L 4.8% of the EPA limit 4 µg/L	1/25	SYR4	2012–2019

65 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicBenzeneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneEthylbenzeneHexachlorobenzeneHfpo-DaHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitritePFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: MCDOWELL, ADAM J
Phone: 419-782-1886
Email: [email protected]

Frequently asked questions about Westerville City

Is Westerville City tap water safe to drink?

EPA monitoring detected 21 contaminants in Westerville 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 Westerville City's water?

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

How many people does Westerville City serve?

Westerville City reports serving 39,000 people in Ohio, per its EPA record.

Has Westerville City had any water quality violations?

The EPA has 32 violations on file for Westerville City, of which 12 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.