PRASA CAYEY WTP
NPDES ID: PR0022519
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: 1 effluent violation.
Violations
May 31, 2026
BOD, 5-day, 20 deg. C
63% over limit
Discharged 8.16 mg/L against a permitted limit of 5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
Oxygen, dissolved [DO]
0% over limit
Discharged 7 mg/L against a permitted limit of 5 mg/L (INST MIN)
DMR, Limited - Overdue
Turbidity
0% over limit
Discharged 9.8 NTU against a permitted limit of 200 NTU (DAILY MX)
DMR, Limited - Overdue
pH
0% over limit
Discharged 8 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.764 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Copper, total [as Cu]
0% over limit
Discharged 0.00816 mg/L against a permitted limit of 0.05556 mg/L (DAILY MX)
DMR, Limited - Overdue
Temperature, water deg. centigrade
0% over limit
Discharged 24 deg C against a permitted limit of 30 deg C (DAILY MX)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
160% over limit
Discharged 13 mg/L against a permitted limit of 5 mg/L (DAILY MX)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
160% over limit
Discharged 13 mg/L against a permitted limit of 5 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 (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 (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 (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 (DAILY MX)
DMR, Limited - Numeric Violation
Solids, settleable
0% over limit
Discharged 0.04 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 7 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Overdue
October 31, 2025
BOD, 5-day, 20 deg. C
51% over limit
Discharged 7.56 mg/L against a permitted limit of 5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
51% over limit
Discharged 7.56 mg/L against a permitted limit of 5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
51% over limit
Discharged 7.56 mg/L against a permitted limit of 5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
51% over limit
Discharged 7.56 mg/L against a permitted limit of 5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
51% over limit
Discharged 7.56 mg/L against a permitted limit of 5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
BOD, 5-day, 20 deg. C
860% over limit
Discharged 48 mg/L against a permitted limit of 5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
BOD, 5-day, 20 deg. C
4300% over limit
Discharged 220 mg/L against a permitted limit of 5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 16, 2026 (9 hours ago)