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Clean Water Act discharge permit · NPDES OK0022781

CHELSEA, TOWN OF, Chelsea, OK: NPDES OK0022781 discharge permit, effluent exceedances, inspections, penalties

CHELSEA, TOWN OF, held by Chelsea, Town of, holds NPDES permit OK0022781, which discharges to 121610 Trib/Pryor Ck/Grand River. EPA’s file records it issued October 10, 2005 and expiring October 31, 2010. 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 filedCHELSEA, TOWN OF
Permittee as filedChelsea, Town of
NPDES IDOK0022781
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
IssuedOctober 10, 2005
Expiration dateOctober 31, 2010
Issuing agencyODEQ
AddressChelsea, OK 74016
Receiving water121610 Trib/Pryor Ck/Grand River
SubwatershedHeadwaters Pryor Creek (HUC 110702090402)

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
Solids, total suspended9285246April 30, 2024303% over the limit
BOD, carbonaceous [5 day, 20 C]3211199April 30, 2024550% over the limit
pH4222194December 31, 2023
BOD, 5-day, 20 deg. C6182154March 31, 2024383% over the limit
Nitrogen, ammonia total [as N]67459April 30, 2024943% over the limit
Oxygen, dissolved [DO]21812February 29, 202434% over the limit
Coliform, fecal general21511September 30, 2023225% over the limit
Flow, in conduit or thru treatment plant4300
Chlorine, total residual160

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

EPA’s single-event violation file, as loaded, holds no violation for NPDES OK0022781.

Inspections

EPA’s inspection file holds no inspection for NPDES OK0022781.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES OK0022781.

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

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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 OK0022781 there.

CHELSEA, TOWN OF, Chelsea, Oklahoma: Individual permit OK0022781, held by Chelsea, Town of; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued October 10, 2005, term to October 31, 2010, by ODEQ; discharges to 121610 Trib/Pryor Ck/Grand River.

  • Solids, total suspended: 9 limits, 285 violations of any kind, 246 effluent exceedances, latest April 30, 2024, largest 303% over the limit.
  • BOD, carbonaceous [5 day, 20 C]: 3 limits, 211 violations of any kind, 199 effluent exceedances, latest April 30, 2024, largest 550% over the limit.
  • pH: 4 limits, 222 violations of any kind, 194 effluent exceedances, latest December 31, 2023.
  • BOD, 5-day, 20 deg. C: 6 limits, 182 violations of any kind, 154 effluent exceedances, latest March 31, 2024, largest 383% over the limit.
  • Nitrogen, ammonia total [as N]: 6 limits, 74 violations of any kind, 59 effluent exceedances, latest April 30, 2024, largest 943% over the limit.
  • Oxygen, dissolved [DO]: 2 limits, 18 violations of any kind, 12 effluent exceedances, latest February 29, 2024, largest 34% over the limit.
  • Coliform, fecal general: 2 limits, 15 violations of any kind, 11 effluent exceedances, latest September 30, 2023, largest 225% over the limit.
  • Flow, in conduit or thru treatment plant: 4 limits, 30 violations of any kind, 0 effluent exceedances.
  • Chlorine, total residual: 1 limit, 6 violations of any kind, 0 effluent exceedances.

Oklahoma holds 197 Publicly owned treatment works coverages of this permit type in EPA’s file; 6 were issued before OK0022781.

Coverages issued nearest OK0022781

CHELSEA, TOWN OF among its neighbors

EPA’s permit file holds 1 discharge permits in the Headwaters Pryor Creek subwatershed (HUC 110702090402), OK0022781 among them. Its county holds 19, 2 of them major permits; OK0022781 is a minor permit.

Nearby on the register

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

What this page shows

The page covers the NPDES permit OK0022781 for Chelsea, Town of, a Minor Discharger class 9 facility. It lists 9 pollutants on file, 9 under a numeric limit, and 9 with an effluent exceedance.