PlainEnviro

Delaware, OH

Moderate Risk (36/100)

A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology.

Environmental data for Delaware in Ohio · Population: 221,160

Delaware, OH is tracked across three EPA datasets covering 15 Toxics Release Inventory (TRI) facilities, 4 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 36/100 (Moderate Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.

Industrial disclosures inside the county total 507.2K lbs of reported toxic releases under EPCRA Section 313, while 1 water system carries an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 42 and a peak AQI of 105 in 2024, with 83% of observed days rated "Good" (0–50).

All figures below draw directly from federal EPA records, TRI self-reported emissions, SDWIS compliance history, NPL Hazard Ranking System scores, and AQS daily AQI summaries, and are not adjusted, weighted, or forecast. A past violation or elevated score does not itself indicate current unsafe conditions; it documents the regulatory and disclosure history publicly filed with the U.S. Environmental Protection Agency through the most recent reporting cycle.

Population
221,160
TRI Facilities
15
Water Systems
4
Superfund Sites
0
Total Releases
507.2K lbs

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 200 (83%) 41 1 105
2023 211 (86%) 33 1 108
2022 230 (94%) 14 0 100
2021 222 (93%) 18 0 77
2020 222 (91%) 21 1 101
2024 Good Air Quality: 83% of days
Unhealthy days: 1
Median AQI: 42

Source: EPA Air Quality System (AQS) Annual AQI by County 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 (4)

System Population Violations
DEL-CO WATER COMPANY, INC. 150,000 0
DELAWARE CITY PWS 43,895 0
THE LAURELS OF FULTON 50 2
PICKET FENCES MHP 27 0

TRI Facilities (15)

# Facility Total Releases
1 Ppg Industries Ohio Inc - Delaware 142.0K lbs
2 Chroma Color Corp 132.0K lbs
3 Astemo Americas Inc. 69.4K lbs
4 American Howa of Ohio 45.7K lbs
5 Liberty Casting Co Llc. 42.3K lbs
6 Abrasive Technology 42.0K lbs
7 Charter Next Generation - Delaware 30.5K lbs
8 Henkel US Operations Corp 2.1K lbs
9 Worthington Cylinders Corp 735 lbs
10 Nagase Chemtex America 260 lbs
11 Sam Dong Ohio Inc 125 lbs
12 Midwest Acoust-A-Fiber 39 lbs
13 Oberfields - Sunbury Oh Masonry Plant 0 lbs
14 Luvata Ohio Inc Fpbu 0 lbs
15 Oberfields - Delaware Oh Masonry Plant 0 lbs

Cities in Delaware (4)

Delaware
Pop: -
11 facilities · 2 water
Sunbury
Pop: -
2 facilities · 0 water
Westerville
Pop: -
1 facilities · 8 water
Lewis Center
Pop: -
1 facilities · 1 water

Frequently Asked Questions

What is the environmental risk level in Delaware, Ohio? ▼
Delaware, OH has an environmental risk score of 36/100 (Moderate Risk), based on 15 TRI facilities, 0 Superfund sites, and 4 water systems on record. 1 water system have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.
Are there Superfund sites in Delaware? ▼
No Superfund National Priorities List (NPL) sites are currently registered in Delaware, OH in the EPA database.
How many toxic release facilities are in Delaware? ▼
Delaware, OH has 15 TRI-reporting facilities on record with the EPA Toxic Release Inventory, with a combined total of 507.2K lbs in reported toxic releases. TRI facilities self-report annual chemical release data to the EPA.
What is the air quality in Delaware? ▼
In 2024, Delaware, OH recorded a median AQI of 42 and a peak AQI of 105. 83% of monitored days had "Good" air quality (AQI 0–50). Source: EPA Air Quality System (AQS) Annual AQI by County.
Is the drinking water safe in Delaware? ▼
Delaware, OH has 4 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 Delaware? ▼
Environmental compliance in Delaware, 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 Editorial