Ottawa, OH
Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against other tracked counties rather than against these fixed caps.
Environmental data for Ottawa in Ohio · Population: 40,161
TRI sites such as Materion Brush Inc; US Army National Guard Camp Perry Ranges; Graymont Dolime (oh) Inc.; SDWIS systems such as OTTAWA COUNTY REGIONAL WATER DISTRICT; PORT CLINTON CITY; PUT-IN-BAY VILLAGE anchor Ottawa, OH's EPA extract. Derived burden score 41/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Health-flagged SDWIS rows in Ottawa include PUT-IN-BAY VILLAGE; GENOA VILLAGE; MARBLEHEAD VILLAGE, while Materion Brush Inc leads reported TRI pounds among local Form R filers. No AQS county monitors report here.
Burden score 41/100 (Moderate Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Ottawa -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.
Release-over-release change
What changed for Ottawa, OH: EPA TRI 2023 reporting year
Same facilities, both years
+16.8%
5 facilities that filed in 2022 and 2023
Whole inventory
+16.8%
1.1 million lb → 1.3 million lb, every facility that filed
- Ottawa, OH's total reported releases rose from 1.1 million lb in 2022 to 1.3 million lb in 2023, based on EPA TRI filings.
- Ottawa, OH's off-site transfers rose from 715.7 thousand lb in 2022 to 896.3 thousand lb in 2023, based on EPA TRI filings.
- Ottawa, OH's chemicals reported rose from 14 in 2022 to 16 in 2023, based on EPA TRI filings.
- Ottawa, OH's land releases fell from 88.1 thousand lb in 2022 to 80.5 thousand lb in 2023, based on EPA TRI filings.
Water Systems (10)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| OTTAWA COUNTY REGIONAL WATER DISTRICT | 20,428 | 0 |
| PORT CLINTON CITY | 6,500 | 0 |
| PUT-IN-BAY VILLAGE | 5,000 | 8 |
| OAK HARBOR VILLAGE | 4,400 | 0 |
| GENOA VILLAGE | 3,110 | 1 |
| CARROLL WATER AND SEWER | 2,288 | 0 |
| MARBLEHEAD VILLAGE | 865 | 5 |
| GREEN VALLEY MOBILE HOME PARK | 82 | 1 |
| GREENWOOD MOBILE HOME PARK | 77 | 0 |
| HILLSIDE MHP | 69 | 7 |
TRI Facilities (5)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Materion Brush Inc | 5.1M lbs |
| 2 | US Army National Guard Camp Perry Ranges | 228.1K lbs |
| 3 | Graymont Dolime (oh) Inc. | 1.9K lbs |
| 4 | US Gypsum Co | 490 lbs |
| 5 | Northern Manufacturing Co | 193 lbs |
Cities in Ottawa (7)
Frequently Asked Questions
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What does this county environmental profile show?
This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.
Read our methodology - how this data is sourced, computed, and verified.