PRASA PONCE WWTP
NPDES ID: PR0021563
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: 2 effluent violations.
Violations
May 31, 2026
Solids, suspended percent removal
45% over limit
Discharged 42 % against a permitted limit of 60 % (MO AV MN)
DMR, Limited - Numeric Violation
April 30, 2026
Nickel, total [as Ni]
23% over limit
Discharged 0.0102 mg/L against a permitted limit of 0.00828 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
23% over limit
Discharged 0.0102 mg/L against a permitted limit of 0.00828 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
BOD, 5-day, percent removal
9% over limit
Discharged 24 % against a permitted limit of 30 % (MO AV MN)
DMR, Limited - Numeric Violation
January 31, 2026
Nickel, total [as Ni]
81% over limit
Discharged 0.015 mg/L against a permitted limit of 0.00828 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
81% over limit
Discharged 0.015 mg/L against a permitted limit of 0.00828 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, percent removal
16% over limit
Discharged 19 % against a permitted limit of 30 % (MO AV MN)
DMR, Limited - Numeric Violation
December 31, 2025
BOD, 5-day, percent removal
4% over limit
Discharged 27 % against a permitted limit of 30 % (MO AV MN)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
5% over limit
Discharged 58 % against a permitted limit of 60 % (MO AV MN)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
18% over limit
Discharged 16133 kg/d against a permitted limit of 13692 kg/d (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
BOD, 5-day, percent removal
20% over limit
Discharged 16 % against a permitted limit of 30 % (MO AV MN)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
70% over limit
Discharged 32 % against a permitted limit of 60 % (MO AV MN)
DMR, Limited - Numeric Violation
August 31, 2025
Turbidity
0% over limit
Discharged 120 NTU against a permitted limit of 91 NTU (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
Turbidity
0% over limit
Discharged 100 NTU against a permitted limit of 91 NTU (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
BOD, 5-day, 20 deg. C
1% over limit
Discharged 135 mg/L against a permitted limit of 134 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
BOD, 5-day, percent removal
3% over limit
Discharged 28 % against a permitted limit of 30 % (MO AV MN)
DMR, Limited - Numeric Violation
March 31, 2025
Solids, suspended percent removal
5% over limit
Discharged 58 % against a permitted limit of 60 % (MO AV MN)
DMR, Limited - Numeric Violation
October 31, 2024
Turbidity
0% over limit
Discharged 110 NTU against a permitted limit of 91 NTU (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2024
Solids, suspended percent removal
8% over limit
Discharged 57 % against a permitted limit of 60 % (MO AV MN)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)