Hamilton, 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 Hamilton in Ohio · Population: 827,878
TRI sites such as Miami Fort Power Co LLC; Environmental Enterprises Inc; American Craft Brewery LLC; SDWIS systems such as CINCINNATI PUBLIC WATER SYSTEM; NORWOOD CITY PWS; INDIAN HILL CITY PWS; NPL sites such as Pristine, Inc. anchor Hamilton, OH's EPA extract. Derived burden score 77/100 (High 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 Hamilton include LOCKLAND VILLAGE PWS; TIMBERBROOK MOBILE HOME PARK; ADDYSTON VILLAGE PWS, while Miami Fort Power Co LLC leads reported TRI pounds among local Form R filers. AQS median AQI 52 / peak 140 in 2024.
Burden score 77/100 (High 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 Hamilton -- 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 Hamilton, OH: EPA TRI 2023 reporting year
Same facilities, both years
-31.9%
80 facilities that filed in 2022 and 2023
Whole inventory
-31.9%
2.7 million lb → 1.8 million lb, every facility that filed
Between the two reporting years, 2 facilities filed for the first time and 5 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Hamilton, OH's total reported releases fell from 2.7 million lb in 2022 to 1.8 million lb in 2023, based on EPA TRI filings.
- Hamilton, OH's water releases rose from 35.7 thousand lb in 2022 to 58.1 thousand lb in 2023, based on EPA TRI filings.
- Hamilton, OH's air releases fell from 1.2 million lb in 2022 to 641.4 thousand lb in 2023, based on EPA TRI filings.
- Hamilton, OH's off-site transfers fell from 1.5 million lb in 2022 to 1.1 million lb in 2023, based on EPA TRI filings.
Air Quality History (2020–2024)
EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.
| Year | Good | Moderate | Unhealthy (SG) | Max AQI |
|---|---|---|---|---|
| 2024 | 164 (45%) | 191 | 11 | 140 |
| 2023 | 129 (35%) | 217 | 17 | 193 |
| 2022 | 125 (34%) | 236 | 3 | 151 |
| 2021 | 109 (30%) | 251 | 5 | 140 |
| 2020 | 105 (29%) | 254 | 7 | 126 |
Source: EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)
For real-time air quality readings and pollutant breakdowns in Ohio, see the EPA's AirNow.gov.
Water Systems (25)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| CINCINNATI PUBLIC WATER SYSTEM | 750,200 | 0 |
| NORWOOD CITY PWS | 19,870 | 0 |
| INDIAN HILL CITY PWS | 15,000 | 0 |
| HARRISON CITY PWS | 11,600 | 0 |
| WYOMING CITY PWS | 9,700 | 0 |
| READING CITY PWS | 9,506 | 0 |
| CLEVES VILLAGE PWS | 6,000 | 0 |
| LOCKLAND VILLAGE PWS | 3,486 | 2 |
| GLENDALE VILLAGE PWS | 2,500 | 0 |
| TIMBERBROOK MOBILE HOME PARK | 1,418 | 2 |
| ADDYSTON VILLAGE PWS | 900 | 2 |
| BRIGHTSTAR LIMA MHP PWS | 480 | 0 |
| OAK BROOK ESTATES | 455 | 1 |
| CHATEAU ESTATES MHP PWS | 430 | 1 |
| WHISPERING PINES RV PARK | 308 | 0 |
| PINE GLEN MOBILE HOME PARK LLC, | 303 | 0 |
| QUAIL RUN MOBILE HOME ESTATES | 260 | 0 |
| HICKORY MANOR MOBILE HOME PARK | 250 | 7 |
| TWIN RIVERS WATER CORPORATION | 245 | 0 |
| HONEY CREEK VILLAGE MHP PWS | 225 | 1 |
| WOODLAND HILLS MOBILE HOME PARK #2 | 168 | 0 |
| COUNTRY ACRES MOBILE HOME PARK | 150 | 2 |
| WOODLAND HILLS MOBILE HOME PARK #1 | 100 | 0 |
| BRIGHTSTAR FREMONT MHP PWS | 100 | 1 |
| BRIGHTSTAR FOSTORIA EAST MHP PWS | 65 | 0 |
TRI Facilities (50)
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| Pristine, Inc. | NPL Site | 35.25 |
Cities in Hamilton (14)
Frequently Asked Questions
What is the environmental risk level in Hamilton, Ohio? ▼
Are there Superfund sites in Hamilton? ▼
How many toxic release facilities are in Hamilton? ▼
What is the air quality in Hamilton? ▼
Is the drinking water safe in Hamilton? ▼
What environmental agencies cover Hamilton? ▼
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.