NEWPORT STP
NPDES ID: PA0021237
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: 2 effluent violations, 39 reporting violations.
Violations
May 31, 2026
Nitrogen, ammonia total [as N]
43% over limit
Discharged 4.285 mg/L against a permitted limit of 3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, ammonia total [as N]
51% over limit
Discharged 13.59 mg/L against a permitted limit of 9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Solids, total suspended
0% over limit
Discharged 0 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
Copper, total [as Cu]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.04994 kg/d (MO AVG)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 0 kg/d against a permitted limit of 48.1239996 kg/d (MO AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Overdue
Phosphorus, Total
0% over limit
Discharged 0 kg against a permitted limit of 0 kg (MO TOTAL)
DMR, Monitor Only - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Copper, total [as Cu]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.037 mg/L (DAILY MX)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 0 mg/L against a permitted limit of 40 mg/L (WKLY AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 9 SU (INST MAX)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Copper, total [as Cu]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.07264 kg/d (DAILY MX)
DMR, Limited - Overdue
Nitrogen, Total
0% over limit
Discharged 0 kg against a permitted limit of 0 kg (MO TOTAL)
DMR, Monitor Only - Overdue
Nitrogen, Kjeldahl, total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, Ammonia Total
0% over limit
Discharged 0 kg against a permitted limit of 0 kg (MO TOTAL)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 0 mg/L against a permitted limit of 5 mg/L (INST MIN)
DMR, Limited - Overdue
Ultraviolet light transmittance
0% over limit
Discharged 0 % against a permitted limit of 0 % (DAILY MN)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 9 mg/L (MO AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 0 kg/d against a permitted limit of 77.17999935 kg/d (WKLY AVG)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 0 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 6 SU (INST MIN)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 kg/d against a permitted limit of 86.71399927 kg/d (WKLY AVG)
DMR, Limited - Overdue
Copper, total [as Cu]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.026 mg/L (MO AVG)
DMR, Limited - Overdue
Coliform, fecal general
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 10000 MPN/100mL (INST MAX)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrite + Nitrate total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Coliform, fecal general
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 2000 MPN/100mL (GEO MEAN)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 kg/d against a permitted limit of 17.25199986 kg/d (MO AVG)
DMR, Limited - Overdue
Nitrite Plus Nitrate Total
0% over limit
Discharged 0 kg against a permitted limit of 0 kg (MO TOTAL)
DMR, Monitor Only - Overdue
Phosphorus, Total
0% over limit
Discharged 0 kg against a permitted limit of 0 kg (MO TOTAL)
DMR, Monitor Only - Overdue
Nitrogen, Kjeldahl Total
0% over limit
Discharged 0 kg against a permitted limit of 0 kg (MO TOTAL)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 0 kg/d against a permitted limit of 58.11199951 kg/d (MO AVG)
DMR, Limited - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 0 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, Total
0% over limit
Discharged 0 kg against a permitted limit of 0 kg (MO TOTAL)
DMR, Monitor Only - Overdue
February 28, 2026
Nitrogen, ammonia total [as N]
21% over limit
Discharged 20.88399982 kg/d against a permitted limit of 17.25199986 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
110% over limit
Discharged 18.94 mg/L against a permitted limit of 9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
142% over limit
Discharged 21.82 mg/L against a permitted limit of 9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
3% over limit
Discharged 17.70599985 kg/d against a permitted limit of 17.25199986 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
9% over limit
Discharged 49 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Coliform, fecal general
11% over limit
Discharged 222 MPN/100mL against a permitted limit of 200 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
May 31, 2025
Solids, total suspended
125% over limit
Discharged 195.21999836 kg/d against a permitted limit of 86.71399927 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
142% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 1000 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
78% over limit
Discharged 80 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Nitrogen, ammonia total [as N]
15% over limit
Discharged 10.362 mg/L against a permitted limit of 9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)