PERU STARVED ROCK HYDROELECTRIC PLANT, CITY OF
NPDES ID: IL0078051
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
This quarter: 3 effluent violations.
Violations
May 31, 2026
Solids, total suspended
73% over limit
Discharged 26 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Solids, total suspended
7% over limit
Discharged 32 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
113% over limit
Discharged 32 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Solids, total suspended
153% over limit
Discharged 76 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
407% over limit
Discharged 76 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Overdue
October 31, 2025
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Overdue
September 30, 2025
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Overdue
August 31, 2025
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)