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Clean Water Act discharge permit · NPDES OH0023566

SOMERSET WWTP, Somerset, OH: NPDES OH0023566 discharge permit, effluent exceedances, inspections, penalties

SOMERSET WWTP, held by Village of Somerset, holds NPDES permit OH0023566, which discharges to Somerset Creek. EPA’s file records it issued September 14, 2018 and expiring September 30, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedSOMERSET WWTP
Permittee as filedVillage of Somerset
NPDES IDOH0023566
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMinor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedSeptember 14, 2018
Expiration dateSeptember 30, 2023
AddressSomerset, OH 43783
Receiving waterSomerset Creek
Receiving water impaired303(D) Listed
SubwatershedCenter Branch (HUC 050302040101)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Nitrogen, ammonia total [as N]12141133February 28, 202630,886% over the limit
Solids, total suspended66056May 31, 202619,312% over the limit
E. coli, MTEC-MF62117July 31, 20261,604% over the limit
BOD, carbonaceous [5 day, 20 C]62016February 28, 20262,777% over the limit
Oxygen, dissolved [DO]4107October 31, 202590% over the limit
pH8183July 31, 2020
Oil and grease, hexane extr method162July 31, 200720% over the limit
Chlorine, total residual162October 31, 202474,900% over the limit
Coliform, fecal MF, MFC broth, 44.5 C031July 31, 20089% over the limit
Phosphorus, total [as P]211May 31, 202464% over the limit
Temperature, water deg. centigrade640
Nitrite + Nitrate total [as N]240
Flow, in conduit or thru treatment plant240
Chromium, hexavalent dissolved [as Cr]220
Flow, maximum during 24 hr period220
Nitrogen, ammonia in bottom deposits200
Nitrogen, Kjeldahl, total [as N]200
Phosphorous, total, in bottom deposits200
Potassium, in bottom deposits200
Nickel, total recoverable200
Zinc, total recoverable200
Cadmium, total recoverable200
Lead, total recoverable200
Chromium, total recoverable200
Copper, total recoverable200
Stream flow [severity]200
Rainfall200
Mercury, total low level200
Biosolids weight indluding admixtures200
Sludge weight, dry200
Overflows200
Arsenic, dry weight100
Cadmium, in bottom deposits [dry wgt]100
Copper in bottom deposits [dry wgt]100
Lead, total dry weight [as Pb]100
Nickel, tot in bottom deposits [dry wgt]100
Zinc in bottom deposits [dry wgt]100
Selenium, dry weight100
Fecal coliform in sludge, CFU/gram100
Mercury, tot in bot deposits [dry wgt]100
Molybdenum, sludge, total, dry weight [as Mo]100

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

DateWhat EPA recordedAgency
October 29, 2025Permit Violations - Violation Specified in CommentST6
July 7, 2025WW SSO - Narrative effluent violationST6
May 17, 2023Permit Violations - Failure to Submit Timely Permit Renewal ApplicationST6
May 17, 2023Reporting Violations - Improper/ Incorrect ReportingST6
May 17, 2023WW SSO - Improper Operation and MaintenanceST6
May 16, 2023Biosolids - Land Application: Facility Failed to Keep Records for Preparers and AppliersST6
May 16, 2023Biosolids - Land Application: Vector Attraction Reduction ViolationST6

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, OH0023566.

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  • One state — $4,990/year
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How we handle your data → Privacy

EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID OH0023566 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.