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Clean Water Act discharge permit · NPDES IL0027201

FOUR RIVERS SANITATION AUTHORITY STP, Rockford, IL: NPDES IL0027201 discharge permit, effluent exceedances, inspections, penalties

FOUR RIVERS SANITATION AUTHORITY STP, held by ROCK RIVER WATER RECLAMATION DISTRICT, holds NPDES permit IL0027201, which discharges to Rock River. EPA’s file records it issued May 24, 2011 and expiring May 31, 2016. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedFOUR RIVERS SANITATION AUTHORITY STP
Permittee as filedROCK RIVER WATER RECLAMATION DISTRICT
NPDES IDIL0027201
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedMay 24, 2011
Expiration dateMay 31, 2016
AddressRockford, IL 61109
Receiving waterROCK RIVER
Receiving water impaired303(D) Listed
SubwatershedCity of Rockford-Rock River (HUC 070900050401)

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
Coliform, fecal general21716October 31, 2025550% over the limit
Solids, total suspended91211January 31, 20253,165% over the limit
Chlorine, total residual4117April 30, 20081,104% over the limit
Nitrogen, ammonia total [as N]7276December 31, 202479% over the limit
Chromium, hexavalent [as Cr]031January 31, 2000156% over the limit
BOD, carbonaceous [5 day, 20 C]850
Oil & Grease020
Cyanide, total [as CN]020
Cyanide, free [amenable to chlorination]020
Fluoride, total [as F]020
Arsenic, total [as As]020
Barium, total [as Ba]020
Beryllium, total [as Be]020
Cadmium, total [as Cd]020
Chromium, total [as Cr]020
Copper, total [as Cu]020
Iron, total [as Fe]020
Iron, dissolved [as Fe]020
Lead, total [as Pb]020
Manganese, total [as Mn]020
Thallium, total [as Tl]020
Nickel, total [as Ni]020
Silver, total [as Ag]020
Zinc, total [as Zn]020
Antimony, total [as Sb]020
Selenium, total [as Se]020
Phenolics, total recoverable020
Mercury, total [as Hg]020
Flow, in conduit or thru treatment plant610
pH400
Nitrogen, total [as N]200
Phosphorus, total [as P]200
BOD, 5-day, 20 deg. C100

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

The newest 50 of 61.

DateWhat EPA recordedAgency
August 20, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
August 17, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
July 15, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
June 29, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
June 15, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
June 11, 2026Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
June 11, 2026Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
June 11, 2026Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
June 11, 2026Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
June 11, 2026Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
May 1, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
April 27, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
April 19, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
April 19, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
April 19, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
April 19, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
March 28, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
March 16, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
March 12, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
February 22, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
February 21, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
February 21, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
February 16, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
February 16, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
February 16, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
February 7, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
February 7, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
February 2, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
February 2, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
February 2, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
February 2, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
January 22, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
January 22, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
January 2, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
December 23, 2025Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
December 18, 2025Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
November 28, 2025Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
November 26, 2025Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
November 13, 2025Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
October 24, 2025Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
September 15, 2025Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
August 5, 2025Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentST6
July 27, 2025Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
July 22, 2025Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
July 2, 2025Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
June 30, 2025Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
May 29, 2025Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
May 6, 2025Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentST6
April 23, 2025Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
April 3, 2025Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6

Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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.

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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 IL0027201 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.