EPA-regulated facilities in Seneca County, OH

There are 419 EPA-regulated facilities inside Seneca County, Ohio. The most common kinds are hazardous waste (199), water discharge (108), drinking water systems (82). 7 are currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 34 have a violation on record. Penalties over the last five years total $264k across 3 sites.

Open the map of Seneca County

419facilities in the county

7in significant noncompliance

34with a violation on record

$264kin penalties, last 5 years

By category

Category	Facilities
Hazardous waste	199
Large quantity generators	1
Small quantity generators	89
Transporters	1
Chemical (RMP/TRI)	38
Superfund	6
Air emissions	65
Major sources	7
Synthetic minor sources	9
Minor sources	32
Water discharge	108
Major permits	1
Minor permits	47
Drinking water systems	82
Greenhouse gas reporters	5
Scrap yards	4

A facility enrolled in several programs counts once in the total and once in each of its categories.

In significant noncompliance

The EPA's designation for its most serious or persistent violations, as of the latest data.

CLINTON LAKE CAMPING 1 PWS-CLINTON LAKE CAMPGROUND NO 1 4990 E TWP RD 122, REPUBLIC, OH, 44867 Significant noncompliance
BLOOMVILLE WWTP NORTH DOUGLAS STREET, BLOOMVILLE, OH, 44818 Significant noncompliance
OLD FORT LOCAL SCHOOL 7635 N CO RD 51, OLD FORT, OH, 44861 Significant noncompliance
THORWORKS INDUSTRIES INC SANITARY TREATMENT SYSTEM 8050 E COUNTY ROAD 62, GREEN SPRINGS, OH, 44836 Significant noncompliance
ATTICA WATER TREATMENT PLANT 4571 S STATE RTE 4, ATTICA, OH, 44807 Significant noncompliance
THYSSENKRUPP CRANKSHAFT CO LLC 901 SPRINGVILLE AVENUE, FOSTORIA, OH, 44830 Significant noncompliance
FLAT ROCK HOMES 7353 COUNTY RD 29, FLAT ROCK, OH, 44828 Significant noncompliance

Largest penalties

Penalties assessed over the last five years.

CARMEUSE LIME, INC. - MAPLE GROVE OPERATIONS MAPLE GROVE, TIFFIN, OH, 44883 $260k in penalties
GARSITE PROGRESS LLC 2679 S US 23, ALVADA, OH, 44802 $3k in penalties
RIVER VALLEY COMMUNITIES : FOSTORIA MOBILE ESTATES 5473 N TWP RD 63, FOSTORIA, OH, 44830 $1k in penalties

Superfund sites

TIFFIN GLASS VINE& FOURTH STREET (NW CORNER), TIFFIN, OH, 44883
NATIONAL ELECTRICAL CARBON CORPORATION 200 N TOWN ST, FOSTORIA, OH, 44830
FOSTORIA INDUSTRIES SITE 1200 N MAIN ST, FOSTORIA, OH, 44830
HOBBS BROTHERS MOCK ROAD AT ROUTE #23, CAREY, OH, 43316
BENDIX AUTOLITE CORP 1600 NORTH UNION STREET, FOSTORIA, OH, 44830
SPRINGVILLE MARSH LOCATED ON TOWNSHIP ROAD 24, BIG SPRING, CAREY, OH, 43316

Towns in Seneca County

Bordering counties

Reading these numbers

These are regulatory records, not measurements of pollution. Most facilities appear because they hold a permit or file reports, and most of them are compliant; a listing is not a claim that a facility has polluted anything. Compliance status and penalties are the EPA's own determinations in data retrieved Oct 9, 2026. The Data page explains where each record comes from and how it can mislead.