VILONIA, CITY OF
NPDES ID: AR0047121
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
This quarter: 5 effluent violations.
Violations
May 31, 2026
Nitrogen, ammonia total [as N]
29% over limit
Discharged 7.2 mg/L against a permitted limit of 5.6 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
135% over limit
Discharged 470 MPN/100mL against a permitted limit of 200 MPN/100mL (30DA GEO)
DMR, Limited - Numeric Violation
Coliform, fecal general
376% over limit
Discharged 1905 MPN/100mL against a permitted limit of 400 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, ammonia total [as N]
13% over limit
Discharged 6.3 mg/L against a permitted limit of 5.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
116% over limit
Discharged 12.1 mg/L against a permitted limit of 5.6 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Coliform, fecal general
Limit violation
Discharged 2000 MPN/100mL against a permitted limit of 2000 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
February 28, 2026
pH
0% over limit
Discharged 5.89 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Numeric Violation
November 30, 2025
pH
0% over limit
Discharged 5.45 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Numeric Violation
September 30, 2025
Coliform, fecal general
2% over limit
Discharged 408 MPN/100mL against a permitted limit of 400 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
Coliform, fecal general
67% over limit
Discharged 334 MPN/100mL against a permitted limit of 200 MPN/100mL (30DA GEO)
DMR, Limited - Numeric Violation
June 30, 2025
Coliform, fecal general
106% over limit
Discharged 824 MPN/100mL against a permitted limit of 400 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
Coliform, fecal general
56% over limit
Discharged 312 MPN/100mL against a permitted limit of 200 MPN/100mL (30DA GEO)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 5.53 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Numeric Violation
May 31, 2025
Solids, total suspended
3% over limit
Discharged 15.5 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
120% over limit
Discharged 440 MPN/100mL against a permitted limit of 200 MPN/100mL (30DA GEO)
DMR, Limited - Numeric Violation
Coliform, fecal general
278% over limit
Discharged 1510 MPN/100mL against a permitted limit of 400 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
43% over limit
Discharged 8 mg/L against a permitted limit of 5.6 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
34% over limit
Discharged 6.7 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Nitrogen, ammonia total [as N]
131% over limit
Discharged 24.53415979 kg/d against a permitted limit of 10.62359991 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
263% over limit
Discharged 54.5 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
370% over limit
Discharged 26.3 mg/L against a permitted limit of 5.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
12% over limit
Discharged 25.8 mg/L against a permitted limit of 23 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
115% over limit
Discharged 61.06299949 kg/d against a permitted limit of 28.42039976 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
224% over limit
Discharged 73 mg/L against a permitted limit of 22.5 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
Limit violation
Discharged 2000 MPN/100mL against a permitted limit of 2000 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
373% over limit
Discharged 26.5 mg/L against a permitted limit of 5.6 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
Limit violation
Discharged 2000 MPN/100mL against a permitted limit of 1000 MPN/100mL (30DA GEO)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
53% over limit
Discharged 22.9 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
2% over limit
Discharged 9.2 mg/L against a permitted limit of 9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
82% over limit
Discharged 41 mg/L against a permitted limit of 22.5 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
47% over limit
Discharged 22 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
8% over limit
Discharged 14.6 mg/L against a permitted limit of 13.5 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
81% over limit
Discharged 3610 MPN/100mL against a permitted limit of 2000 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
December 31, 2024
Nitrogen, ammonia total [as N]
19% over limit
Discharged 16.1 mg/L against a permitted limit of 13.5 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Nitrogen, ammonia total [as N]
2% over limit
Discharged 17.29285985 kg/d against a permitted limit of 17.02499986 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
5% over limit
Discharged 1053 MPN/100mL against a permitted limit of 1000 MPN/100mL (30DA GEO)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
32% over limit
Discharged 11.9 mg/L against a permitted limit of 9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Nitrogen, ammonia total [as N]
190% over limit
Discharged 14.5 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
Limit violation
Discharged 2000 MPN/100mL against a permitted limit of 2000 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
6% over limit
Discharged 10.05609992 kg/d against a permitted limit of 9.48859992 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
180% over limit
Discharged 15.7 mg/L against a permitted limit of 5.6 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Coliform, fecal general
203% over limit
Discharged 1210 MPN/100mL against a permitted limit of 400 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
Coliform, fecal general
180% over limit
Discharged 559 MPN/100mL against a permitted limit of 200 MPN/100mL (30DA GEO)
DMR, Limited - Numeric Violation
August 31, 2024
Nitrogen, ammonia total [as N]
564% over limit
Discharged 37.2 mg/L against a permitted limit of 5.6 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
208% over limit
Discharged 29.23759975 kg/d against a permitted limit of 9.48859992 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
Limit violation
Discharged 2000 MPN/100mL against a permitted limit of 400 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
Coliform, fecal general
Limit violation
Discharged 1554 MPN/100mL against a permitted limit of 200 MPN/100mL (30DA GEO)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
516% over limit
Discharged 30.8 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2024
Nitrogen, ammonia total [as N]
14% over limit
Discharged 6.4 mg/L against a permitted limit of 5.6 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)