Hamilton, IN
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.
Environmental data for Hamilton in Indiana · Population: 357,176
TRI sites such as King Systems Corp; Industrial Dielectrics Inc.; Countrymark Refining & Logistics LLC; SDWIS systems such as CARMEL WATER DEPARTMENT; CICERO WATER DEPARTMENT; ARCADIA WATER DEPARTMENT anchor Hamilton, IN's EPA extract. Derived burden score 42/100 (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 Hamilton include CARMEL WATER DEPARTMENT; ATLANTA WATER DEPARTMENT; INDIANA ACADEMY, while King Systems Corp leads reported TRI pounds among local Form R filers. AQS median AQI 44 / peak 108 in 2024.
Burden score 42/100 (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 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, IN: EPA TRI 2023 reporting year
Same facilities, both years
-16.6%
12 facilities that filed in 2022 and 2023
Whole inventory
-16.6%
75.6 thousand lb → 63.1 thousand lb, every facility that filed
- Hamilton, IN's total reported releases fell from 75.6 thousand lb in 2022 to 63.1 thousand lb in 2023, based on EPA TRI filings.
- Hamilton, IN's air releases fell from 71.3 thousand lb in 2022 to 58.2 thousand lb in 2023, based on EPA TRI filings.
- Hamilton, IN's off-site transfers rose from 4.3 thousand lb in 2022 to 4.8 thousand lb in 2023, based on EPA TRI filings.
- Hamilton, IN's chemicals reported fell from 23 in 2022 to 22 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 | 244 (67%) | 121 | 1 | 108 |
| 2023 | 220 (60%) | 134 | 8 | 190 |
| 2022 | 241 (66%) | 124 | 0 | 100 |
| 2021 | 232 (64%) | 133 | 0 | 100 |
| 2020 | 247 (67%) | 119 | 0 | 97 |
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 Indiana, see the EPA's AirNow.gov.
Water Systems (13)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| CARMEL WATER DEPARTMENT | 99,927 | 7 |
| CICERO WATER DEPARTMENT | 5,607 | 0 |
| ARCADIA WATER DEPARTMENT | 1,515 | 0 |
| ATLANTA WATER DEPARTMENT | 735 | 1 |
| CARMEL CLAY WATER | 393 | 0 |
| SUBURBAN ESTATES, LLC | 350 | 0 |
| PINE RIDGE | 135 | 0 |
| HAMILTON COUNTY REGIONAL UTILITY | 125 | 0 |
| INDIANA ACADEMY | 113 | 13 |
| EAGLETOWN ESTATES MOBILE HOME PARK | 97 | 0 |
| STONEY CREEK ESTATES MHC, LLC | 45 | 3 |
| COUNTRY CLUB CROSSING | 44 | 0 |
| LITTLE EAGLE CREEK ESTATES | 35 | 1 |
TRI Facilities (12)
| # | Facility | Total Releases |
|---|---|---|
| 1 | King Systems Corp | 185.5K lbs |
| 2 | Industrial Dielectrics Inc. | 81.4K lbs |
| 3 | Countrymark Refining & Logistics LLC | 9.9K lbs |
| 4 | Indiana Mills & Manufacturing Inc. | 1.4K lbs |
| 5 | Helmer Scientific Trane Technologies | 891 lbs |
| 6 | Id Castings LLC | 231 lbs |
| 7 | Emc Precision II | 8 lbs |
| 8 | Oldcastle Lawn & Garden | 0 lbs |
| 9 | Chemstation of Indiana | 0 lbs |
| 10 | Smc Corp of America | 0 lbs |
| 11 | Valvoline Global Products | 0 lbs |
| 12 | Weas Engineering | 0 lbs |
Cities in Hamilton (8)
Frequently Asked Questions
What is the environmental risk level in Hamilton, Indiana? ▼
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.