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Clean Water Act discharge permit · NPDES ILR10ZF4Z

IAWC SHIELDS BRANCH SEWER REHABILITATION, Alton, IL: NPDES ILR10ZF4Z discharge permit, effluent exceedances, inspections, penalties

IAWC SHIELDS BRANCH SEWER REHABILITATION, held by Plocher Construction, holds NPDES permit ILR10ZF4Z. EPA’s file records it issued March 1, 2025 and expiring August 31, 2028. 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.

What the register holds for IAWC SHIELDS BRANCH SEWER REHABILITATION: its NPDES ID, its permit type and status, its dates, its address in Alton, Illinois. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES ILR10ZF4Z.

Identity

Facility as filedIAWC SHIELDS BRANCH SEWER REHABILITATION
Permittee as filedPlocher Construction
NPDES IDILR10ZF4Z
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramConstruction stormwater
IssuedMarch 1, 2025
Expiration dateAugust 31, 2028
Issuing agencyIEPA
AddressAlton, IL 62002
SubwatershedCity of Alton-Mississippi River (HUC 071100090402)

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

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES ILR10ZF4Z.

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 ILR10ZF4Z.

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, ILR10ZF4Z.

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How often?
  • One permit holder — $99/month
  • One watershed — $2,990/year
  • One state — $4,990/year
  • The whole register — $18,000/year

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 ILR10ZF4Z there.

Nearby on the register

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

What this page shows

Of the 11 storm water construction permits in Alton, 0.0% have a violation on file. IAWC SHIELDS BRANCH SEWER REHABILITATION belongs to a set of 11 permits in which 54.5% were issued before it, and the City of Alton-Mississippi River subwatershed (HUC 071100090402) holds 12 NPDES permits.