SOUTHERN HILLS SUBDIVISION
NPDES ID: MD3687B10
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
Nitrogen, total [as N]
106% over limit
Discharged 16.49 mg/L against a permitted limit of 8 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, total [as N]
65% over limit
Discharged 13.23 mg/L against a permitted limit of 8 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Solids, total dissolved
48% over limit
Discharged 741 mg/L against a permitted limit of 500 mg/L (ANNL MAX)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
32% over limit
Discharged 10.59 mg/L against a permitted limit of 8 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
31% over limit
Discharged 326.5 mg/L against a permitted limit of 250 mg/L (ANNL MAX)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, total [as N]
64% over limit
Discharged 13.12 mg/L against a permitted limit of 8 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrite + Nitrate total [as N]
0% over limit
Discharged 19.26 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 5 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.004699 MGD against a permitted limit of 0.0108 MGD (MO AVG)
DMR, Limited - Overdue
Nitrogen, total [as N]
228% over limit
Discharged 26.26 mg/L against a permitted limit of 8 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrogen, total [as N]
228% over limit
Discharged 26.26 mg/L against a permitted limit of 8 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, Kjeldahl, total [as N]
0% over limit
Discharged 7 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 1.42 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Overdue
September 30, 2025
Solids, total suspended
0% over limit
Discharged 3.75 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrite + Nitrate total [as N]
0% over limit
Discharged 31.78 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.004873 MGD against a permitted limit of 0.0108 MGD (MO AVG)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 1.5 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrogen, total [as N]
396% over limit
Discharged 39.65 mg/L against a permitted limit of 8 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrogen, total [as N]
396% over limit
Discharged 39.65 mg/L against a permitted limit of 8 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, Kjeldahl, total [as N]
0% over limit
Discharged 10.63 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
August 31, 2025
Nitrogen, total [as N]
273% over limit
Discharged 29.8 mg/L against a permitted limit of 8 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrogen, total [as N]
273% over limit
Discharged 29.8 mg/L against a permitted limit of 8 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
0% over limit
Discharged 3 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0.67 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.004375 MGD against a permitted limit of 0.0108 MGD (MO AVG)
DMR, Limited - Overdue
Nitrite + Nitrate total [as N]
0% over limit
Discharged 24.67 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, Kjeldahl, total [as N]
0% over limit
Discharged 5.13 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
July 31, 2025
Nitrogen, total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 8 mg/L (MO AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - 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
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
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0.0108 MGD (MO AVG)
DMR, Limited - Overdue
June 30, 2025
Nitrogen, total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 8 mg/L (MO AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0.0108 MGD (MO AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - 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
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
May 31, 2025
Nitrogen, total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 8 mg/L (MO AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - 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
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
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0.0108 MGD (MO AVG)
DMR, Limited - Overdue
December 31, 2024
Coliform, fecal general
2900% over limit
Discharged 3 MPN/100mL against a permitted limit of 0.1 MPN/100mL (MAXIMUM)
DMR, Limited - Numeric Violation
Coliform, fecal general
10500% over limit
Discharged 10.6 MPN/100mL against a permitted limit of 0.1 MPN/100mL (MAXIMUM)
DMR, Limited - Numeric Violation
Solids, total dissolved
22% over limit
Discharged 608.5 mg/L against a permitted limit of 500 mg/L (ANNL MAX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
1% over limit
Discharged 253.45 mg/L against a permitted limit of 250 mg/L (ANNL MAX)
DMR, Limited - Numeric Violation
Coliform, fecal general
36300% over limit
Discharged 36.4 MPN/100mL against a permitted limit of 0.1 MPN/100mL (MAXIMUM)
DMR, Limited - Numeric Violation
Coliform, fecal general
31700% over limit
Discharged 31.8 MPN/100mL against a permitted limit of 0.1 MPN/100mL (MAXIMUM)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (6 days ago)