Clean Water Act discharge permit · NPDES IL0030783

ROCK ISLAND MAIN STP, CITY OF, Rock Island, IL: NPDES IL0030783 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MajorDischarger class
12Pollutants under a numeric limit
4Pollutants with an effluent exceedance

ROCK ISLAND MAIN STP, CITY OF, held by ROCK ISLAND, CITY OF, holds NPDES permit IL0030783, which discharges to Mississippi, Sylvan Sl, Blckhwk Ck. EPA’s file records it issued December 1, 2010 and expiring November 30, 2015. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	ROCK ISLAND MAIN STP, CITY OF
Permittee as filed	ROCK ISLAND, CITY OF
NPDES ID	IL0030783
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Major discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	December 1, 2010
Expiration date	November 30, 2015
Address	Rock Island, IL 61201
Receiving water	MISSISSIPPI, SYLVAN SL, BLCKHWK CK
Receiving water impaired	303(D) Listed
Subwatershed	Sugar Creek-Mississippi River (HUC 070801010406)
Program components on file	POTW, Pretreatment
SIC	4952 – Sewerage Systems
Other EPA IDs (FRS)	ICIS-AIR source IL000161065AHC

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

12Pollutants on file
12Under a numeric limit
8With a violation of any kind
4With an effluent exceedance

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 measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Solids, total suspended	9	36	34	August 31, 2019	463% over the limit
Coliform, fecal general	5	22	17	June 30, 2025	99,999% over the limit
Chlorine, total residual	6	14	7	July 31, 2015	100% over the limit
BOD, 5-day, 20 deg. C	5	8	6	July 31, 2002	87% over the limit
pH	10	10	0
Flow	5	4	0
Flow, total	4	4	0
Nitrogen, total [as N]	1	1	0
Flow, in conduit or thru treatment plant	4	0	0
BOD, carbonaceous [5 day, 20 C]	4	0	0
Phosphorus, total [as P]	1	0	0
Chlorine rate	1	0	0

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

7Single-event violations

Date	What EPA recorded	Agency
August 27, 2026	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
August 18, 2026	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
August 17, 2026	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
June 17, 2026	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
May 20, 2026	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
April 3, 2026	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
March 11, 2025	Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment	ST6

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.

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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 IL0030783 there.

Nearby on the register

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

This public-records page covers NPDES permit IL0030783 held by Rock Island, City of, for the Rock Island Main STP, which discharges to the Mississippi, Sylvan Sl, and Blckhwk Ck and is listed as administratively continued. The page lists 12 pollutants under a numeric limit, 4 of which had an effluent exceedance, with the permit issued December 1, 2010 and expiring November 30, 2015.