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Marion, OH

Moderate Risk (47/100)

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 Marion in Ohio · Population: 65,145

TRI sites such as Ohio Galvanizing Corp; Whirlpool Corp Marion Operations; Nucor Steel Marion Inc; SDWIS systems such as AQUA OHIO - MARION; AQUA OHIO - TIFFIN; AQUA OHIO - LA RUE VILLAGE PWS; NPL sites such as Little Scioto River anchor Marion, OH's EPA extract. Derived burden score 47/100 (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 Marion include AQUA OHIO - LA RUE VILLAGE PWS, while Ohio Galvanizing Corp leads reported TRI pounds among local Form R filers. No AQS county monitors report here.

Burden score 47/100 (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 Marion -- 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 Marion, OH: EPA TRI 2023 reporting year

2022 → 2023

Same facilities, both years

-13.2%

10 facilities that filed in 2022 and 2023

Whole inventory

-13.2%

1.8 million lb → 1.6 million lb, every facility that filed

  • Marion, OH's total reported releases fell from 1.8 million lb in 2022 to 1.6 million lb in 2023, based on EPA TRI filings.
  • Marion, OH's air releases rose from 112.4 thousand lb in 2022 to 131.0 thousand lb in 2023, based on EPA TRI filings.
  • Marion, OH's off-site transfers fell from 1.7 million lb in 2022 to 1.5 million lb in 2023, based on EPA TRI filings.
  • Marion, OH's chemicals reported fell from 35 in 2022 to 32 in 2023, based on EPA TRI filings.
County population (Census ACS)
65,145
TRI Facilities
14
Water Systems
3
Superfund Sites
1
Total Releases
8.0M lbs

Water Systems (3)

System System pop (SDWIS) Violations
AQUA OHIO - MARION 47,102 0
AQUA OHIO - TIFFIN 20,279 0
AQUA OHIO - LA RUE VILLAGE PWS 800 1

TRI Facilities (14)

# Facility Total Releases
1 Ohio Galvanizing Corp 5.8M lbs
2 Whirlpool Corp Marion Operations 1.0M lbs
3 Nucor Steel Marion Inc 982.2K lbs
4 Poet Biorefining-Marion LLC 119.1K lbs
5 Sika Corp-Marion Operations 19.5K lbs
6 Nachurs Alpine Solutions 7.6K lbs
7 Glen-Gery Corp 6.4K lbs
8 Semco Inc 363 lbs
9 Hildreth Manufacturing LLC 145 lbs
10 Glen-Gery Corp 76 lbs
11 US Yachiyo Inc 1 lbs
12 Arcelormittal Tubular Products USA LLC 1 lbs
13 Mills Co 0 lbs
14 Overhead Door Co Todco Div 0 lbs

Superfund Sites (1)

Site Name Status HRS Score
Little Scioto River NPL Site 48.03

Cities in Marion (4)

Marion
12 facilities · 3 water
Caledonia
1 facilities · 0 water
Iberia
1 facilities · 0 water
Marion Township
0 facilities · 0 water

Frequently Asked Questions

What is the environmental risk level in Marion, Ohio? ▼
Marion, OH has an environmental risk score of 47/100 (Moderate Risk), based on 14 TRI facilities, 1 Superfund sites, and 3 water systems on record. 1 water system have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.
Are there Superfund sites in Marion? ▼
Yes, Marion, OH has 1 Superfund site on the EPA National Priorities List (NPL). Superfund sites are contaminated locations that require long-term cleanup under the EPA Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).
How many toxic release facilities are in Marion? ▼
Marion, OH has 14 TRI-reporting facilities on record with the EPA Toxic Release Inventory, with a combined total of 8.0M lbs in reported toxic releases. TRI facilities self-report annual chemical release data to the EPA.
What is the air quality in Marion? ▼
Air quality monitoring data (EPA AQS) is not available for Marion, OH. This may indicate no EPA monitoring stations are located in the county. For regional air quality data, see the state environmental profile or visit EPA's AirNow.gov.
Is the drinking water safe in Marion? ▼
Marion, OH has 3 EPA-regulated water systems. 1 system has reported health-based violations (MCL exceedances). A past violation does not necessarily mean water is currently unsafe. For current water quality, contact your local water utility. Source: EPA SDWIS.
What environmental agencies cover Marion? ▼
Environmental compliance in Marion, Ohio is overseen by the U.S. Environmental Protection Agency (EPA) at the federal level and the Ohio state environmental agency. Facilities report to the EPA Toxic Release Inventory, water systems are regulated under the Safe Drinking Water Act, and contaminated sites are managed under the Superfund program. Contact your state environmental agency for local concerns.

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.

Related Guides

Understanding EPA Data
How EPA collects and publishes environmental data
Environmental Justice
Who lives near polluters and environmental hazards
How to Check Environmental Quality
Step-by-step guide to checking your local environment

Read our methodology - how this data is sourced, computed, and verified.

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Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro