OCEAN PINES WWTP
NPDES ID: MD0023477
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
April 30, 2026
BOD, 5-day, 20 deg. C
6% over limit
Discharged 15.97 mg/L against a permitted limit of 15 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, total [as N]
234% over limit
Discharged 13.37 mg/L against a permitted limit of 4 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, total [as N]
324% over limit
Discharged 16.96 mg/L against a permitted limit of 4 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, total [as N]
6% over limit
Discharged 4.23 mg/L against a permitted limit of 4 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrogen, total [as N]
53% over limit
Discharged 4.59 mg/L against a permitted limit of 3 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
6% over limit
Discharged 0.53 mg/L against a permitted limit of 0.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
32% over limit
Discharged 19.85 mg/L against a permitted limit of 15 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, total [as N]
33% over limit
Discharged 5.31 mg/L against a permitted limit of 4 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
February 28, 2025
Nitrogen, total [as N]
198% over limit
Discharged 11.92 mg/L against a permitted limit of 4 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
January 31, 2025
Nitrogen, total [as N]
68% over limit
Discharged 6.71 mg/L against a permitted limit of 4 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
December 31, 2024
Hexachlorobenzene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)
DMR, Monitor Only - Overdue
Heptachlor epoxide
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)
DMR, Monitor Only - Overdue
Chlordane [tech mix. and metabolites]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)
DMR, Monitor Only - Overdue
4,4'-DDT
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)
DMR, Monitor Only - Overdue
4,4'-DDD
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)
DMR, Monitor Only - Overdue
Benzo[a]pyrene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)
DMR, Monitor Only - Overdue
Chrysene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)
DMR, Monitor Only - Overdue
Endrin
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)
DMR, Monitor Only - Overdue
Benzo[a]anthracene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)
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
Toxaphene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)
DMR, Monitor Only - Overdue
Bis[2-chloroethoxy]methane
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)
DMR, Monitor Only - Overdue
Benzo[k]fluoranthene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)
DMR, Monitor Only - Overdue
Benzidine
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)
DMR, Monitor Only - Overdue
Benzo[b]fluoranthene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)
DMR, Monitor Only - Overdue
BOD, 5-day, percent removal
0% over limit
Discharged 0 % against a permitted limit of 85 % (MINIMUM)
DMR, Limited - Overdue
Flow, total
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (MO TOTAL)
DMR, Monitor Only - Overdue
Heptachlor
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)
DMR, Monitor Only - Overdue
Aldrin
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)
DMR, Monitor Only - Overdue
Cyanide, free [amenable to chlorination]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)
DMR, Monitor Only - Overdue
Dibenz[a,h]anthracene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)
DMR, Monitor Only - Overdue
Indeno[1,2,3-cd]pyrene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)
DMR, Monitor Only - Overdue
Solids, suspended percent removal
0% over limit
Discharged 0 % against a permitted limit of 85 % (MINIMUM)
DMR, Limited - Overdue
4,4'-DDE
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)
DMR, Monitor Only - Overdue
Dieldrin
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)
DMR, Monitor Only - Overdue
September 30, 2024
Cyanide, free [amenable to chlorination]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)
DMR, Monitor Only - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (5 days ago)