Water system
Oak Harbor Village
EPA ID OH6202603 · Ottawa County · 4,400 people served · owned by a local government
Oak Harbor Village buys its water from Ottawa County Regional Water District.
The system's record
- Water bodies
- Lake Erie
- Raw intakes
- Lake Erie
- Serves
- 20,428 people · Ottawa County
- EPA ID
- OH6205011
About this area's water Ottawa County Regional Water District
What it costs
$4.99 per 1,000 gallons
Typical household bill about $24 a month for water.
Retail schedule effective January 2023. A standard residential 5/8-inch to 3/4-inch meter carries a $24.00 monthly minimum that includes the first 4,500 gallons; because typical…
Water quality & impurities
EPA compliance record · Oak Harbor Village
Lead at the tap: 90th-percentile result 0 ppb in 2025 (action level 15 ppb).
EPA record: no health-based violations since 2015.
3 violations of any kind logged since 2020: 3 for required testing that was missed or reported late.
EPA compliance record · Ottawa County Regional Water District (treats the water)
Lead at the tap: 90th-percentile result 0 ppb in 2025 (action level 15 ppb).
EPA record: no health-based violations since 2015.
1 violation of any kind logged since 2020: 1 for a report, record or notice that was missing, late or incomplete (the yearly water quality report, a public notice, lead line records).
Projects & plans3
Recent and current work
- Ottawa County Regional Water Treatment Plant construction · $23 million · 1999 · completed
Original 6 MGD plant. Approximately $23 million in total construction cost, funded through special assessments, state and federal grants and various… - 3 MGD plant expansion to 9 MGD · $3.7 million · 2002 · completed
Triggered after the system exceeded peak design capacity on a single hot summer day. - Lead service line inventory · 2024 · completed
The county reports its distribution system has no lead, no galvanized-requiring-replacement and no lead-status-unknown service lines, determined from…
Sewers
Sanitary
The same county department runs the sanitary side. It operates two wastewater treatment facilities - Danbury Township at 3.8 million gallons per day and Portage/Catawba Island at 1.34 MGD - along with roughly 167 miles of sanitary sewer, 83 pump stations and over 1,000 grinder pump stations. The department employs 39 full-time staff…
Storm
Not published. We found no county storm sewer system, stormwater utility or stormwater fee for the water district's service area.
Source: co.ottawa.oh.usco.ottawa.oh.us
Sourcesverified
Compiled from the utility's own reports and public records, then independently re-checked against primary sources.
Present in 1 ZIP code
Serves
Main water supplier in 1 ZIP code
- 43449 · Oak Harbor35% of residents
Population-weighted resident shares; a ZIP code can have more than one system on record. Recomputed from each ZIP's own system list, not from the map's cached footprint.
Buys from · Sells to
Oak Harbor Village buys its water from Ottawa County Regional Water District.
No other system is on record buying water from Oak Harbor Village.
What the records show about Oak Harbor Village
Who runs it
EPA's record describes Oak Harbor Village as owned by a local government. It has 2,300 service connections and serves 4,400 people.
EPA classes it as a community water system, one that serves the same residents all year.
Its office telephone on EPA's record is 419-898-1823.
Source: EPA Safe Drinking Water Information System (SDWIS), water system record.
How the water is treated
Oak Harbor Village buys water that Ottawa County Regional Water District treats first, so the steps that count are the seller's. EPA's treatment table registers these steps for Ottawa County Regional Water District: corrosion control, coagulation and settling, chlorine disinfection, iron and manganese removal, fluoridation, powdered activated carbon, and sand or media filtration.
Oak Harbor Village adds nothing of its own on that table.
The list is what each system registered with EPA for treatment plants EPA still shows as active, and it can lag a plant upgrade.
Source: EPA Safe Drinking Water Information System (SDWIS) treatment table (EPA Envirofacts, pulled September 2026).
Violations
EPA's record shows no health-based violations for Oak Harbor Village since 2015.
EPA logs 3 violations of any kind since 2020: 3 for required testing that was missed or reported late.
Source: EPA Safe Drinking Water Information System (SDWIS) violation records: health-based violations with compliance periods beginning in 2015 or later, all violations from 2020 or later (EPA Envirofacts, pulled September 2026).
Lead and copper at the tap
In the sampling period ending December 2025, the 90th-percentile lead result at Oak Harbor Village was 0 ppb, under both the current 15 ppb action level and the 10 ppb level that applies from 2027. A result of 0 means at least nine in ten of the homes sampled had no lead detected.
EPA has 8 sampling periods on file for Oak Harbor Village since 2016, the first ending in 2016; no period was above 10 ppb.
Every water system has to inventory its service lines, the pipes from the main to each building. In the inventory Oak Harbor Village sent EPA, 1,923 lines are counted.
| Material | Lines |
|---|---|
| Lead | 0 |
| Galvanized, needing replacement | 17 |
| Unknown material | 15 |
| Not lead | 1,891 |
| All lines | 1,923 |
Systems sample taps in the homes most likely to have lead pipes or solder. The 90th-percentile result is the level nine in ten of the sampled homes were at or below. Lead comes mostly from service lines and house plumbing, not the source water, so a low result for the system does not clear an old house.
EPA's dashboard status for this inventory: reported all required service line types.
Source: EPA Safe Drinking Water Information System (SDWIS) lead and copper 90th-percentile results (EPA Envirofacts), sampling periods ending 2016 or later; EPA's service line inventory dashboard, Ohio's 2026 Q2 submission.
PFAS
EPA's fifth national round of testing (UCMR 5) took 4 samples of the water entering the pipes of Oak Harbor Village in 2024 and measured 29 PFAS. No PFAS was detected, PFOA and PFOS (federal limit 4 ng/L each) among them.
Ohio EPA's own statewide sampling tested 1 plant of Ottawa County Regional Water District (latest sample September 2020). Not one of the six PFAS tested (PFOA, PFOS, PFHxS, PFNA, GenX and PFBS) was detected.
Ohio EPA's current sampling status map lists 1 plant of Ottawa County Regional Water District as sampled, most recently November 2025.
PFAS are the 'forever chemicals' from firefighting foam, plating shops and non-stick coatings. Results are for water leaving the plant, not your tap.
Source: EPA UCMR 5 occurrence data (final release, August 2026); Ohio EPA statewide PFAS sampling, 2019 to 2021, and its sampling status map.
Disinfection byproducts
Chlorine that disinfects water also reacts with organic matter to form byproducts. Two groups have federal limits: total trihalomethanes (TTHM, 80 µg/L) and five haloacetic acids (HAA5, 60 µg/L), judged on running yearly averages at each sampling site.
For TTHM, the average of Oak Harbor Village's samples in 2019, the last year it was sampled, was 52.5 µg/L. The worst yearly average was 54.1 µg/L and the highest single sample was 109 µg/L, from 66 samples taken from 2012 to 2019.
For HAA5, the average in the last year sampled was 14.6 µg/L. The worst yearly average was 23.7 µg/L and the highest single sample was 80.5 µg/L, from 65 samples.
| Byproduct | Limit | Latest yearly average | Worst yearly average | Highest sample | Samples |
|---|---|---|---|---|---|
| TTHM | 80 µg/L | 52.5 µg/L (2019) | 54.1 µg/L | 109 µg/L | 66 |
| HAA5 | 60 µg/L | 14.6 µg/L | 23.7 µg/L | 80.5 µg/L | 65 |
A yearly average of 0 means nothing was detected in that year's samples. EPA's file stops at 2019; Ohio EPA's Drinking Water Watch has newer results.
Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, distribution-system samples (non-detects counted as zero).
Nitrate, arsenic and radioactivity
The water Oak Harbor Village buys is treated by Ottawa County Regional Water District, so the results below are Ottawa County Regional Water District's.
Nitrate: the highest of 97 samples was 5.09 mg/L (as nitrogen) in 2013; in 2019, the last year sampled, the highest was 3.63 mg/L. No sample was over the limit of 10 mg/L. Nitrate above 10 is unsafe for infants.
Arsenic was not detected in 9 samples (limit 10 µg/L).
| Contaminant | Samples | Highest result | Limit | Samples over limit |
|---|---|---|---|---|
| Nitrate (as nitrogen) | 97 | 5.09 mg/L | 10 mg/L | 0 |
| Arsenic | 9 | not detected | 10 µg/L | 0 |
Measured in finished water: at the plant's entry points and in the distribution system; raw well and intake samples are left out. Non-detects count as zero.
Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, finished water of Ottawa County Regional Water District.
Solvents and fuels
The water Oak Harbor Village buys is treated by Ottawa County Regional Water District, so the results below are Ottawa County Regional Water District's.
EPA's file holds results for all six solvent and fuel compounds it checked. Benzene, carbon tetrachloride, 1,2-dichloroethane, trichloroethylene, tetrachloroethylene, and vinyl chloride were not detected in 8 samples each.
| Compound | Limit | Samples | Detected in | Highest result | Samples over limit |
|---|---|---|---|---|---|
| Benzene | 5 µg/L | 8 | 0 of 8 | not detected | 0 |
| Carbon tetrachloride | 5 µg/L | 8 | 0 of 8 | not detected | 0 |
| 1,2-dichloroethane | 5 µg/L | 8 | 0 of 8 | not detected | 0 |
| Trichloroethylene (TCE) | 5 µg/L | 8 | 0 of 8 | not detected | 0 |
| Tetrachloroethylene (PCE) | 5 µg/L | 8 | 0 of 8 | not detected | 0 |
| Vinyl chloride | 2 µg/L | 8 | 0 of 8 | not detected | 0 |
"Not detected" means the lab's result was below what its method can measure, not that the compound is absent. Non-detects count as zero in the highest-result column.
Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, finished water of Ottawa County Regional Water District.
Farm chemicals and metals
The water Oak Harbor Village buys is treated by Ottawa County Regional Water District, so the results below are Ottawa County Regional Water District's.
EPA's file holds results for 8 of the nine herbicides and metals it checked. Detected: barium in 9 of 9 samples, highest 27 µg/L (limit 2,000). Not detected: atrazine in 12 samples, alachlor in 12 samples, chromium in 9 samples, cadmium in 9 samples, mercury in 9 samples, selenium in 9 samples, thallium in 9 samples.
| Substance | Kind | Limit | Samples | Detected in | Highest result | Samples over limit |
|---|---|---|---|---|---|---|
| Atrazine | Farm chemical | 3 µg/L | 12 | 0 of 12 | not detected | 0 |
| Alachlor | Farm chemical | 2 µg/L | 12 | 0 of 12 | not detected | 0 |
| Chromium | Metal | 100 µg/L | 9 | 0 of 9 | not detected | 0 |
| Cadmium | Metal | 5 µg/L | 9 | 0 of 9 | not detected | 0 |
| Barium | Metal | 2,000 µg/L | 9 | 9 of 9 | 27 µg/L | 0 |
| Mercury | Metal | 2 µg/L | 9 | 0 of 9 | not detected | 0 |
| Selenium | Metal | 50 µg/L | 9 | 0 of 9 | not detected | 0 |
| Thallium | Metal | 2 µg/L | 9 | 0 of 9 | not detected | 0 |
Non-detects count as zero in the highest-result column.
Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, finished water of Ottawa County Regional Water District.
Bacteria in the pipes
From 2012 to 2019, 0 of 483 routine total coliform samples taken in the distribution system at Oak Harbor Village tested positive (0%); in 2019, the last year on file, 0 of 60 did.
A positive coliform test is a warning sign, not a violation by itself. E. coli is a sign that human or animal waste may have reached the water. Coliform counts are routine samples only; E. coli counts include repeat samples.
Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, distribution-system presence/absence tests for total coliform and E. coli.
Fluoride
The Ohio Department of Health's report to the CDC (My Water's Fluoride) says Oak Harbor Village buys its water from Ottawa County Regional Water District, a system that adjusts the fluoride level to the recommended level for preventing tooth decay.
EPA's treatment table lists fluoridation among the steps at Ottawa County Regional Water District, which treats the water Oak Harbor Village buys.
Measured fluoride: 1.11 mg/L on average leaving the plants of Ottawa County Regional Water District, which supplies Oak Harbor Village, in 2019 (in the range dentists aim for); samples ran from 0.95 to 1.11 mg/L across 8 samples in 2012 to 2019.
The recommended level for preventing tooth decay is 0.7 mg/L; the federal limit is 4 mg/L. The treatment list is what each system registered with EPA and can lag a plant upgrade.
Source: CDC My Water's Fluoride (fluoridation status as reported by the Ohio Department of Health, fetched September 2026); EPA Safe Drinking Water Information System (SDWIS) treatment table; EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, entry-point fluoride samples.
Lithium
Lithium was not detected in 4 UCMR 5 samples at Oak Harbor Village, last sampled in 2024 (the method reports from 9 µg/L).
Lithium is not regulated. EPA's draft health reference level is 10 µg/L, and it occurs naturally in deep groundwater, so well systems in the northwest run highest.
Source: EPA UCMR 5 occurrence data (final release, August 2026), samples from 2023 to 2025.
Algal toxins
The water Oak Harbor Village buys is treated by Ottawa County Regional Water District, so the results below are Ottawa County Regional Water District's.
Ohio EPA tests for microcystin, a toxin that harmful algal blooms can release, in raw water at the intake and in treated water.
At the intake, microcystin was detected 76 times in 279 raw-water samples, across 11 bloom seasons (2016 to 2026); the highest raw-water result was 22.335 µg/L on August 12, 2019. The highest raw-water result since 2024 was 2.683 µg/L.
Microcystin was never detected in treated water (191 samples).
In all, 470 samples from 2016 to 2026, the latest on August 18, 2026.
| Water | Samples | Detections | Highest result |
|---|---|---|---|
| Raw water, at the intake | 279 | 76 | 22.335 µg/L |
| Treated water | 191 | 0 | not detected |
The ten-day advisory levels for treated water are 0.3 µg/L for children under six and 1.6 µg/L for everyone else. Any detection at the intake triggers more frequent testing until two clean weeks.
Source: Ohio EPA public water system harmful algal bloom monitoring, 2016 to present (HAB data, fetched September 2026).
Water and sewer bills
Ohio EPA's 2023 rate survey puts the water bill at Oak Harbor Village for a household using 5,000 gallons a month at $408 a year, about $34 a month.
| Use | Water, per year | Sewer, per year |
|---|---|---|
| 2,500 gallons a month | $278 | not on file |
| 5,000 gallons a month | $408 | not on file |
| 8,000 gallons a month | $564 | not on file |
The survey lists it as “Oak Harbor”. These are inside-city rates and annual bills at the use shown.
Source: Ohio EPA 2023 Sewer and Water Rate Survey (Ohio State University, May 2025).
How well the service area is mapped
EPA estimated the service area of Oak Harbor Village with a computer model rather than drawing it from the utility's map, so its edges are approximate.
Counting the people who live in the ZIP codes it overlaps, this atlas estimates 2,786 residents are inside the boundary, 63% of the 4,400 people Oak Harbor Village reports serving.
The resident count is an estimate from 2020 Census ZIP-code populations, not a count of customers.
Source: EPA Service Area Boundaries; resident estimate by this atlas from ZIP-code overlap.
On the map
Show this system's territory on the map — 1 ZIP code in all.
Sources
U.S. EPA SDWIS and Community Water System Service Area Boundaries (v3, 2026), Ohio EPA primacy data, 2020 census blocks: the system serving most residents, traced through purchases to the treating utility; Ohio EPA 2023 Sewer and Water Rate Survey (Ohio State, May 2025) for household bills; Ohio EPA DEFA loan awards since 2016 for the loans paragraph · EPA SDWIS · EPA service area boundaries · Ohio EPA drinking water · Ohio EPA rate survey
EPA's own record for this system: Enforcement and Compliance History report for OH6202603 (EPA ECHO).
