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Tap water quality report

Ottawa County Regional Water District

EPA monitoring tested this supplier for 83 contaminants and detected 21. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

83
contaminants tested
21
detected
20,428
people served
4
health-based violations
Ohio rankingsLead in OhioPFAS in Ohio
Water source
Surface water
Ownership
Local government
Counties served
Ottawa

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.

4
health-based violations
10
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2005-06-01 → 2005-06-30
TT Health-based Resolved 2005-06-01 → 2005-06-30
TT Health-based Resolved 2005-06-01 → 2005-06-30
TT Health-based Resolved 2005-06-01 → 2005-06-30
Other Monitoring Resolved 2020-01-06
Other Monitoring Resolved 2020-01-06
Other Monitoring Resolved 2004-07-01
Other Monitoring Resolved 2004-07-01
Other Monitoring Resolved 2001-07-01
Other Monitoring Resolved 2001-07-01

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Pfhxa 0.0066 µg/L 2/4 2023
Pfba 0.0073 µg/L 1/4 2023
Pfpea 0.0045 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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
3440 µg/L 34%
of the EPA limit 10000 µg/L
worst single sample: 5090 µg/L
168/194 SYR4 2012–2019
Chloroform
75.1 µg/L
No EPA limit set
worst single sample: 84.2 µg/L
141/141 SYR4 2012–2019
Bromodichloromethane
16.7 µg/L
No EPA limit set
worst single sample: 18.9 µg/L
140/140 SYR4 2012–2019
Dibromochloromethane
9.03 µg/L
No EPA limit set
worst single sample: 10.8 µg/L
139/139 SYR4 2012–2019
TTHM
93.02 µg/L 116%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 103 µg/L
133/133 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
42.92 µg/L 72%
of the EPA limit 60 µg/L
worst single sample: 54.7 µg/L
133/133 SYR4 2012–2019
Dichloroacetic Acid
23.55 µg/L
No EPA limit set
worst single sample: 35.3 µg/L
132/133 SYR4 2012–2019
Trichloroacetic Acid
17.9 µg/L
No EPA limit set
worst single sample: 24.2 µg/L
132/132 SYR4 2012–2019
Copper
238.3 µg/L 18%
of the EPA limit 1300 µg/L
worst single sample: 925 µg/L
90/92 SYR4 2013–2019
Nitrate-Nitrite
3440.5 µg/L 34%
of the EPA limit 10000 µg/L
worst single sample: 5120 µg/L
84/97 SYR4 2012–2019
Dibromoacetic Acid
3.2 µg/L
No EPA limit set
worst single sample: 3.8 µg/L
77/130 SYR4 2012–2019
Bromoform
1.555 µg/L
No EPA limit set
worst single sample: 2.3 µg/L
44/136 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 15/15 LCR 2025
Monochloroacetic Acid
5.44 µg/L
No EPA limit set
worst single sample: 6 µg/L
15/133 SYR4 2012–2019
Barium
27 µg/L 1.4%
of the EPA limit 2000 µg/L
 9/9 SYR4 2012–2019
Fluoride
1098 µg/L 27%
of the EPA limit 4000 µg/L
worst single sample: 1110 µg/L
9/9 SYR4 2012–2019
Lead
48.75 µg/L 325%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 54 µg/L
6/92 SYR4 2013–2019
Nitrite
100 µg/L 10%
of the EPA limit 1000 µg/L
 1/97 SYR4 2012–2019
62 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 TetrachlorideChromiumDichloromethaneEthylbenzeneGross Beta Particle ActivityHfpo-DaLassoMercuryMonobromoacetic AcidNetfosaaNfdhaNmefosaaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MULDER, ZACHARY
Phone
419-734-6725
Email
[email protected]

Frequently asked questions about Ottawa County Regional Water District

Is Ottawa County Regional Water District tap water safe to drink?

EPA monitoring detected 21 contaminants in Ottawa County Regional Water District'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 Ottawa County Regional Water District's water?

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

How many people does Ottawa County Regional Water District serve?

Ottawa County Regional Water District reports serving 20,428 people in Ohio, per its EPA record.

Has Ottawa County Regional Water District had any water quality violations?

The EPA has 10 violations on file for Ottawa County Regional Water District, of which 4 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.