PUERTO RICO ELECTRIC PWR AUTH
NPDES ID: PR0001031
X — SNC: Effluent violation (non-monthly average limit)
The facility discharged more of a pollutant than its permit allows, measured over a period other than a monthly average.
This quarter: 5 effluent violations.
Violations
June 30, 2026
Solids, total suspended
20% over limit
Discharged 36 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Cyanide, free available
70% over limit
Discharged 0.0017 mg/L against a permitted limit of 0.001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2026
Solids, total suspended
23% over limit
Discharged 37 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Cyanide, free available
190% over limit
Discharged 0.0029 mg/L against a permitted limit of 0.001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Cyanide, free available
10% over limit
Discharged 0.0011 mg/L against a permitted limit of 0.001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
Solids, total suspended
10% over limit
Discharged 33 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Copper, total [as Cu]
4% over limit
Discharged 0.00388 mg/L against a permitted limit of 0.00373 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
8% over limit
Discharged 32.3 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Copper, total [as Cu]
62% over limit
Discharged 0.00605 mg/L against a permitted limit of 0.00373 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
Copper, total [as Cu]
102% over limit
Discharged 0.00755 mg/L against a permitted limit of 0.00373 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2025
Solids, total suspended
20% over limit
Discharged 36 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Copper, total [as Cu]
52% over limit
Discharged 0.00566 mg/L against a permitted limit of 0.00373 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
Nickel, total [as Ni]
367% over limit
Discharged 0.03868 mg/L against a permitted limit of 0.00828 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2024
Solids, total suspended
72% over limit
Discharged 51.5 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 16, 2026 (9 hours ago)