PRASA YAUCO WWTP
NPDES ID: PR0021661
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
BOD, 5-day, 20 deg. C
40% over limit
Discharged 7 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
BOD, 5-day, 20 deg. C
60% over limit
Discharged 8 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Solids, total suspended
158% over limit
Discharged 116 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
9% over limit
Discharged 0.01018 mg/L against a permitted limit of 0.0093 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
160% over limit
Discharged 13 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
160% over limit
Discharged 13 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
160% over limit
Discharged 13 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
160% over limit
Discharged 13 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
160% over limit
Discharged 13 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
83% over limit
Discharged 55 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
BOD, 5-day, 20 deg. C
100% over limit
Discharged 10 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
100% over limit
Discharged 10 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
100% over limit
Discharged 10 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
100% over limit
Discharged 10 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
100% over limit
Discharged 10 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Color [PT-CO units]
0% over limit
Discharged 30 col unit (pc) against a permitted limit of 15 col unit (pc) (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
BOD, 5-day, 20 deg. C
180% over limit
Discharged 14 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
180% over limit
Discharged 14 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
180% over limit
Discharged 14 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
180% over limit
Discharged 14 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
180% over limit
Discharged 14 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
BOD, 5-day, 20 deg. C
40% over limit
Discharged 7 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
40% over limit
Discharged 7 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
40% over limit
Discharged 7 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
40% over limit
Discharged 7 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
40% over limit
Discharged 7 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
36% over limit
Discharged 0.01262 mg/L against a permitted limit of 0.0093 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2025
BOD, 5-day, 20 deg. C
100% over limit
Discharged 10 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
BOD, 5-day, 20 deg. C
20% over limit
Discharged 6 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Color [PT-CO units]
0% over limit
Discharged 20 col unit (pc) against a permitted limit of 15 col unit (pc) (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
BOD, 5-day, 20 deg. C
20% over limit
Discharged 6 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Solids, total suspended
44% over limit
Discharged 65 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
120% over limit
Discharged 11 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
BOD, 5-day, 20 deg. C
56% over limit
Discharged 70 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
36% over limit
Discharged 116 kg/d against a permitted limit of 85.25 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
320% over limit
Discharged 21 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Color [PT-CO units]
0% over limit
Discharged 20 col unit (pc) against a permitted limit of 15 col unit (pc) (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
Color [PT-CO units]
0% over limit
Discharged 20 col unit (pc) against a permitted limit of 15 col unit (pc) (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
Color [PT-CO units]
0% over limit
Discharged 20 col unit (pc) against a permitted limit of 15 col unit (pc) (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Color [PT-CO units]
0% over limit
Discharged 20 col unit (pc) against a permitted limit of 15 col unit (pc) (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2024
Color [PT-CO units]
0% over limit
Discharged 20 col unit (pc) against a permitted limit of 15 col unit (pc) (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2024
Color [PT-CO units]
0% over limit
Discharged 20 col unit (pc) against a permitted limit of 15 col unit (pc) (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2024
BOD, 5-day, 20 deg. C
20% over limit
Discharged 6 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
15% over limit
Discharged 0.01065 mg/L against a permitted limit of 0.0093 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (4 days ago)