FRIDAY HARBOR STP
NPDES ID: WA0023582
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
April 30, 2026
BOD, 5-day, 20 deg. C
12% over limit
Discharged 33.5714 mg/L against a permitted limit of 30 mg/L (AVERAGE)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
71% over limit
Discharged 77 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
66% over limit
Discharged 49.7143 mg/L against a permitted limit of 30 mg/L (AVERAGE)
DMR, Limited - Numeric Violation
Solids, total suspended
19% over limit
Discharged 140.73999882 kg/d against a permitted limit of 118.03999901 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
296% over limit
Discharged 178 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Coliform, fecal general
27% over limit
Discharged 506 MPN/100mL against a permitted limit of 400 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
Solids, total suspended
381% over limit
Discharged 144.231 mg/L against a permitted limit of 30 mg/L (AVERAGE)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
127% over limit
Discharged 102 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
256% over limit
Discharged 160 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
110% over limit
Discharged 164.59225062 kg/d against a permitted limit of 78.54199934 kg/d (AVERAGE)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
19% over limit
Discharged 93.55895721 kg/d against a permitted limit of 78.54199934 kg/d (AVERAGE)
DMR, Limited - Numeric Violation
Coliform, fecal general
71% over limit
Discharged 341.674 MPN/100mL against a permitted limit of 200 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
150% over limit
Discharged 74.9615 mg/L against a permitted limit of 30 mg/L (AVERAGE)
DMR, Limited - Numeric Violation
Solids, total suspended
69% over limit
Discharged 199.75999832 kg/d against a permitted limit of 118.03999901 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Solids, total suspended
1% over limit
Discharged 79.44999933 kg/d against a permitted limit of 78.54199934 kg/d (AVERAGE)
DMR, Limited - Numeric Violation
Solids, total suspended
87% over limit
Discharged 84 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
172% over limit
Discharged 81.5 mg/L against a permitted limit of 30 mg/L (AVERAGE)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
11% over limit
Discharged 33.15 mg/L against a permitted limit of 30 mg/L (AVERAGE)
DMR, Limited - Numeric Violation
January 31, 2026
Solids, total suspended
9% over limit
Discharged 32.6154 mg/L against a permitted limit of 30 mg/L (AVERAGE)
DMR, Limited - Numeric Violation
December 31, 2025
Solids, total suspended
19% over limit
Discharged 35.6429 mg/L against a permitted limit of 30 mg/L (AVERAGE)
DMR, Limited - Numeric Violation
July 31, 2025
Coliform, fecal general
24% over limit
Discharged 494 MPN/100mL against a permitted limit of 400 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
June 30, 2025
Coliform, fecal general
65% over limit
Discharged 658 MPN/100mL against a permitted limit of 400 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
December 31, 2024
Nitrite + Nitrate total [as N]
0% over limit
Discharged 3.4 mg/L against a permitted limit of 0 mg/L (MAXIMUM)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 2.93 mg/L against a permitted limit of 0 mg/L (MAXIMUM)
DMR, Monitor Only - Overdue
Nitrogen, Kjeldahl, total [as N]
0% over limit
Discharged 4.04 mg/L against a permitted limit of 0 mg/L (MAXIMUM)
DMR, Monitor Only - Overdue
September 30, 2024
Solids, total suspended
568% over limit
Discharged 200.5 mg/L against a permitted limit of 30 mg/L (AVERAGE)
DMR, Limited - Numeric Violation
Solids, total suspended
1204% over limit
Discharged 587 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
190% over limit
Discharged 341.86199713 kg/d against a permitted limit of 118.03999901 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
54% over limit
Discharged 120.87749898 kg/d against a permitted limit of 78.54199934 kg/d (AVERAGE)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (22 days ago)