POYEN, CITY OF
NPDES ID: AR0048445
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
This quarter: 9 effluent violations.
Violations
May 31, 2026
Solids, total suspended
60% over limit
Discharged 32 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
7% over limit
Discharged 32 mg/L against a permitted limit of 30 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
608% over limit
Discharged 5.78395995 kg/d against a permitted limit of 0.81719999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
378% over limit
Discharged 19.1 mg/L against a permitted limit of 4 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
132% over limit
Discharged 9.69289992 kg/d against a permitted limit of 4.1768 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
218% over limit
Discharged 19.1 mg/L against a permitted limit of 6 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, ammonia total [as N]
375% over limit
Discharged 6.03819995 kg/d against a permitted limit of 1.27119999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
226% over limit
Discharged 19.9 mg/L against a permitted limit of 6.1 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
226% over limit
Discharged 19.9 mg/L against a permitted limit of 6.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Solids, total suspended
320% over limit
Discharged 126 mg/L against a permitted limit of 30 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
75% over limit
Discharged 35 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
17% over limit
Discharged 35 mg/L against a permitted limit of 30 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
814% over limit
Discharged 38.16777968 kg/d against a permitted limit of 4.1768 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
154% over limit
Discharged 10.60089991 kg/d against a permitted limit of 4.17679996 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
169% over limit
Discharged 6.72373994 kg/d against a permitted limit of 2.49699998 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
85% over limit
Discharged 22.2 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
Limit violation
Discharged 2420 MPN/100mL against a permitted limit of 1000 MPN/100mL (30DA GEO)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
31% over limit
Discharged 22.2 mg/L against a permitted limit of 17 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
530% over limit
Discharged 126 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
Limit violation
Discharged 2420 MPN/100mL against a permitted limit of 2000 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
35% over limit
Discharged 22.9 mg/L against a permitted limit of 17 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
91% over limit
Discharged 22.9 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
45% over limit
Discharged 6.05635995 kg/d against a permitted limit of 4.1768 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
178% over limit
Discharged 6.94619994 kg/d against a permitted limit of 2.49699998 kg/d (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Solids, total suspended
23% over limit
Discharged 5.13019996 kg/d against a permitted limit of 4.1768 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
139% over limit
Discharged 5.96555995 kg/d against a permitted limit of 2.49699998 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
64% over limit
Discharged 19.7 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
16% over limit
Discharged 19.7 mg/L against a permitted limit of 17 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, ammonia total [as N]
34% over limit
Discharged 22.7 mg/L against a permitted limit of 17 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
89% over limit
Discharged 22.7 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
175% over limit
Discharged 6.87809994 kg/d against a permitted limit of 2.49699998 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
20% over limit
Discharged 4.99399996 kg/d against a permitted limit of 4.1768 kg/d (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrogen, ammonia total [as N]
641% over limit
Discharged 6.05635995 kg/d against a permitted limit of 0.81719999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
233% over limit
Discharged 20 mg/L against a permitted limit of 6 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
400% over limit
Discharged 20 mg/L against a permitted limit of 4 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 6 mg/L (7 DA AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 kg/d against a permitted limit of 4.1768 kg/d (MO AVG)
DMR, Limited - Overdue
Coliform, fecal general
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 2000 MPN/100mL (7 DA GEO)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 0 mg/L against a permitted limit of 2 mg/L (INST MIN)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 4 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.81719999 kg/d (MO AVG)
DMR, Limited - Overdue
Coliform, fecal general
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 1000 MPN/100mL (30DA GEO)
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
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 (7 DA AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Overdue
Overflows
0% over limit
Discharged 0 occur/d against a permitted limit of 0 occur/d (MO TOTAL)
DMR, Monitor Only - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (7 DA AVG)
DMR, Limited - Overdue
Overflow volume [SS0 volume, CSO volume]
0% over limit
Discharged 0 gal against a permitted limit of 0 gal (MO TOTAL)
DMR, Monitor Only - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 0 kg/d against a permitted limit of 4.17679996 kg/d (MO AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 0 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Overdue
January 31, 2025
BOD, carbonaceous [5 day, 20 C]
287% over limit
Discharged 116 mg/L against a permitted limit of 30 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
480% over limit
Discharged 116 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)