MYRTLE POINT STP
NPDES ID: OR0020435
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
Violations
February 28, 2026
Solids, total suspended
143% over limit
Discharged 198.26179833 kg/d against a permitted limit of 81.71999931 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
815% over limit
Discharged 1495.65758743 kg/d against a permitted limit of 163.43999863 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
48% over limit
Discharged 66.6 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
195% over limit
Discharged 55.7 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Solids, total suspended
519% over limit
Discharged 759.31499362 kg/d against a permitted limit of 122.57999897 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Solids, total suspended
33% over limit
Discharged 39.8 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
393% over limit
Discharged 26 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Solids, total suspended
175% over limit
Discharged 123.6 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
346% over limit
Discharged 364.19879694 kg/d against a permitted limit of 81.71999931 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
22% over limit
Discharged 165.80079861 kg/d against a permitted limit of 136.19999886 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
873% over limit
Discharged 1192.47638998 kg/d against a permitted limit of 122.57999897 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
2078% over limit
Discharged 3560.08637009 kg/d against a permitted limit of 163.43999863 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
BOD, carb-5 day, 20 deg C, percent removal
1025% over limit
Discharged -68.8 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Solids, total suspended
587% over limit
Discharged 309.3 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.1 SU against a permitted limit of 9 SU (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
39% over limit
Discharged 94.6589992 kg/d against a permitted limit of 68.09999943 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
152% over limit
Discharged 100.67 mg/L against a permitted limit of 40 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
1174% over limit
Discharged 2082.3163825 kg/d against a permitted limit of 163.43999863 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
22% over limit
Discharged 30.5 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
612% over limit
Discharged 872.95119267 kg/d against a permitted limit of 122.57999897 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
274% over limit
Discharged 305.58739743 kg/d against a permitted limit of 81.71999931 kg/d (MO AVG)
DMR, Limited - Numeric Violation
E. coli
208% over limit
Discharged 387.6 MPN/100mL against a permitted limit of 126 MPN/100mL (MO GEO)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
198% over limit
Discharged 311.10803739 kg/d against a permitted limit of 104.41999912 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
247% over limit
Discharged 104.2 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
185% over limit
Discharged 57.2 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
November 30, 2025
BOD, carb-5 day, 20 deg C, percent removal
800% over limit
Discharged -35 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
October 31, 2025
BOD, carbonaceous [5 day, 20 C]
13% over limit
Discharged 31.87079973 kg/d against a permitted limit of 28.14799976 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carb-5 day, 20 deg C, percent removal
493% over limit
Discharged 11.1 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
309% over limit
Discharged 38.6 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
17% over limit
Discharged 0.95339999 kg/d against a permitted limit of 0.81719999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
20% over limit
Discharged 34.41319971 kg/d against a permitted limit of 28.60199976 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
389% over limit
Discharged 288.78939757 kg/d against a permitted limit of 59.0199995 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
15% over limit
Discharged 24.51599979 kg/d against a permitted limit of 21.33799982 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
1% over limit
Discharged 20.1 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
80% over limit
Discharged 54 mg/L against a permitted limit of 30 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, total [as N]
33% over limit
Discharged 10.89599991 kg/d against a permitted limit of 8.17199993 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1233% over limit
Discharged 10.89599991 kg/d against a permitted limit of 0.81719999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Nitrogen, total [as N]
41% over limit
Discharged 11.4861999 kg/d against a permitted limit of 8.17199993 kg/d (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
pH
0% over limit
Discharged 5.7 SU against a permitted limit of 6 SU (DAILY MN)
DMR, Limited - Numeric Violation
December 31, 2024
Solids, total suspended
0% over limit
Discharged 123.08303097 kg/d against a permitted limit of 122.57999897 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
E. coli
496% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 5.8 SU against a permitted limit of 6 SU (DAILY MN)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
24% over limit
Discharged 168.52479858 kg/d against a permitted limit of 136.19999886 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
22% over limit
Discharged 198.85199833 kg/d against a permitted limit of 163.43999863 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2024
E. coli
496% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
52% over limit
Discharged 45.6 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
196% over limit
Discharged 241.70959797 kg/d against a permitted limit of 81.71999931 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
453% over limit
Discharged 903.9593924 kg/d against a permitted limit of 163.43999863 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2024
E. coli
496% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
78% over limit
Discharged 1.45279999 kg/d against a permitted limit of 0.81719999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2024
Nitrogen, total [as N]
33% over limit
Discharged 10.83697991 kg/d against a permitted limit of 8.17199993 kg/d (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (4 days ago)