RICH SQUARE WWTP
NPDES ID: NC0025437
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: 6 effluent violations, 2 reporting violations.
Violations
May 31, 2026
BOD, 5-day, 20 deg. C
38% over limit
Discharged 41.5 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
9% over limit
Discharged 49 mg/L against a permitted limit of 45 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Coliform, fecal MF, MFC broth, 44.5 C
318% over limit
Discharged 836.66 MPN/100mL against a permitted limit of 200 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
Coliform, fecal MF, MFC broth, 44.5 C
250% over limit
Discharged 1400 MPN/100mL against a permitted limit of 400 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
April 30, 2026
Coliform, fecal MF, MFC broth, 44.5 C
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 400 MPN/100mL (WK GEOMN)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
67% over limit
Discharged 75 mg/L against a permitted limit of 45 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
72% over limit
Discharged 51.5 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Coliform, fecal MF, MFC broth, 44.5 C
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 400 MPN/100mL (WK GEOMN)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
142% over limit
Discharged 9.695 mg/L against a permitted limit of 4 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Coliform, fecal MF, MFC broth, 44.5 C
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 400 MPN/100mL (WK GEOMN)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
133% over limit
Discharged 9.305 mg/L against a permitted limit of 4 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Coliform, fecal MF, MFC broth, 44.5 C
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 400 MPN/100mL (WK GEOMN)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
14% over limit
Discharged 4.555 mg/L against a permitted limit of 4 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Coliform, fecal MF, MFC broth, 44.5 C
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 400 MPN/100mL (WK GEOMN)
DMR, Limited - Overdue
November 30, 2025
Coliform, fecal MF, MFC broth, 44.5 C
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 400 MPN/100mL (WK GEOMN)
DMR, Limited - Overdue
October 31, 2025
Coliform, fecal MF, MFC broth, 44.5 C
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 400 MPN/100mL (WK GEOMN)
DMR, Limited - Overdue
September 30, 2025
Temperature, water deg. centigrade
0% over limit
Discharged 0 deg C against a permitted limit of 0 deg C (DAILY MX)
DMR, Monitor Only - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Coliform, fecal MF, MFC broth, 44.5 C
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 400 MPN/100mL (WK GEOMN)
DMR, Limited - Overdue
Temperature, water deg. centigrade
0% over limit
Discharged 0 deg C against a permitted limit of 0 deg C (DAILY MX)
DMR, Monitor Only - Overdue
August 31, 2025
Coliform, fecal MF, MFC broth, 44.5 C
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 400 MPN/100mL (WK GEOMN)
DMR, Limited - Overdue
Coliform, fecal MF, MFC broth, 44.5 C
37% over limit
Discharged 273.4958 MPN/100mL against a permitted limit of 200 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
July 31, 2025
Coliform, fecal MF, MFC broth, 44.5 C
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 400 MPN/100mL (WK GEOMN)
DMR, Limited - Overdue
June 30, 2025
Coliform, fecal MF, MFC broth, 44.5 C
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 400 MPN/100mL (WK GEOMN)
DMR, Limited - Overdue
Coliform, fecal MF, MFC broth, 44.5 C
212% over limit
Discharged 624.4997 MPN/100mL against a permitted limit of 200 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
Solids, total suspended
6% over limit
Discharged 143 mg/L against a permitted limit of 135 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
1% over limit
Discharged 91 mg/L against a permitted limit of 90 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
23% over limit
Discharged 37 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
35% over limit
Discharged 0.2029 MGD against a permitted limit of 0.15 MGD (30DA AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Coliform, fecal MF, MFC broth, 44.5 C
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 400 MPN/100mL (WK GEOMN)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
82% over limit
Discharged 54.5 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
32% over limit
Discharged 0.1984 MGD against a permitted limit of 0.15 MGD (30DA AVG)
DMR, Limited - Numeric Violation
Coliform, fecal MF, MFC broth, 44.5 C
2746% over limit
Discharged 5692.0997 MPN/100mL against a permitted limit of 200 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
33% over limit
Discharged 60 mg/L against a permitted limit of 45 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Coliform, fecal MF, MFC broth, 44.5 C
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 400 MPN/100mL (WK GEOMN)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
12% over limit
Discharged 0.1686 MGD against a permitted limit of 0.15 MGD (30DA AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
89% over limit
Discharged 85 mg/L against a permitted limit of 45 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Coliform, fecal MF, MFC broth, 44.5 C
1675% over limit
Discharged 3549.6478 MPN/100mL against a permitted limit of 200 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 31 SU against a permitted limit of 9 SU (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
153% over limit
Discharged 76 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
26% over limit
Discharged 2.51 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
17% over limit
Discharged 13.99 mg/L against a permitted limit of 12 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
36% over limit
Discharged 0.2034 MGD against a permitted limit of 0.15 MGD (30DA AVG)
DMR, Limited - Numeric Violation
Coliform, fecal MF, MFC broth, 44.5 C
450% over limit
Discharged 2200 MPN/100mL against a permitted limit of 400 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
194% over limit
Discharged 11.74 mg/L against a permitted limit of 4 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 4 mg/L (30DA AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 12 mg/L (7 DA AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
72% over limit
Discharged 0.2577 MGD against a permitted limit of 0.15 MGD (30DA AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 32 SU against a permitted limit of 9 SU (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 4 mg/L (30DA AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 12 mg/L (7 DA AVG)
DMR, Limited - Overdue
December 31, 2024
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0.15 MGD (30DA AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 4 mg/L (30DA AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 12 mg/L (7 DA AVG)
DMR, Limited - Overdue
October 31, 2024
Coliform, fecal MF, MFC broth, 44.5 C
1675% over limit
Discharged 7100 MPN/100mL against a permitted limit of 400 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
29% over limit
Discharged 0.1936 MGD against a permitted limit of 0.15 MGD (30DA AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 90 mg/L (30DA 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 (30DA AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
69% over limit
Discharged 0.2535 MGD against a permitted limit of 0.15 MGD (30DA AVG)
DMR, Limited - Numeric Violation
Coliform, fecal MF, MFC broth, 44.5 C
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 200 MPN/100mL (MO GEOMN)
DMR, Limited - Overdue
Coliform, fecal MF, MFC broth, 44.5 C
1400% over limit
Discharged 6000 MPN/100mL against a permitted limit of 400 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
August 31, 2024
Coliform, fecal MF, MFC broth, 44.5 C
1225% over limit
Discharged 5300 MPN/100mL against a permitted limit of 400 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
Coliform, fecal MF, MFC broth, 44.5 C
2422% over limit
Discharged 5043.808 MPN/100mL against a permitted limit of 200 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
July 31, 2024
Flow, in conduit or thru treatment plant
52% over limit
Discharged 0.2279 MGD against a permitted limit of 0.15 MGD (30DA AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
18% over limit
Discharged 35.5 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Coliform, fecal MF, MFC broth, 44.5 C
3321% over limit
Discharged 6841.0525 MPN/100mL against a permitted limit of 200 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
Coliform, fecal MF, MFC broth, 44.5 C
1850% over limit
Discharged 7800 MPN/100mL against a permitted limit of 400 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)