ARCADIA, TOWN OF-WWTP
NPDES ID: LA0038504
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: 3 effluent violations.
Violations
May 31, 2026
Nitrogen, ammonia total [as N]
37% over limit
Discharged 2.73 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, ammonia total [as N]
117% over limit
Discharged 8.68 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
334% over limit
Discharged 8.68 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
176% over limit
Discharged 10.41021991 kg/d against a permitted limit of 3.76819997 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
179% over limit
Discharged 79.30017933 kg/d against a permitted limit of 28.42039976 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
5% over limit
Discharged 2.1 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
7% over limit
Discharged 16 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
293% over limit
Discharged 7.85 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
96% over limit
Discharged 7.85 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
85% over limit
Discharged 6.98705994 kg/d against a permitted limit of 3.76819997 kg/d (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
105% over limit
Discharged 4.1 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
43% over limit
Discharged 5.38897995 kg/d against a permitted limit of 3.76819997 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
3% over limit
Discharged 4.1 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, ammonia total [as N]
49% over limit
Discharged 5.97 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
199% over limit
Discharged 5.97 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
8% over limit
Discharged 5.5 mg/L against a permitted limit of 6 mg/L (MO AV MN)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrogen, ammonia total [as N]
200% over limit
Discharged 5.99 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
10% over limit
Discharged 5.4 mg/L against a permitted limit of 6 mg/L (MO AV MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
50% over limit
Discharged 5.99 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Nitrogen, ammonia total [as N]
48% over limit
Discharged 5.57965995 kg/d against a permitted limit of 3.76819997 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
109% over limit
Discharged 48 mg/L against a permitted limit of 23 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
778% over limit
Discharged 35.1 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
286% over limit
Discharged 38.64 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
220% over limit
Discharged 48 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1655% over limit
Discharged 35.1 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
158% over limit
Discharged 38.64 mg/L against a permitted limit of 15 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Coliform, fecal general
400% over limit
Discharged 1000 MPN/100mL against a permitted limit of 200 MPN/100mL (MOAV GEO)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
11% over limit
Discharged 2.22 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
150% over limit
Discharged 1000 MPN/100mL against a permitted limit of 400 MPN/100mL (WKAV GEO)
DMR, Limited - Numeric Violation
March 31, 2025
Solids, total dissolved
425% over limit
Discharged 1366.72612852 kg/d against a permitted limit of 260.14199781 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total dissolved
121% over limit
Discharged 1366.72612852 kg/d against a permitted limit of 619.2559948 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Nitrogen, ammonia total [as N]
137% over limit
Discharged 8.93925992 kg/d against a permitted limit of 3.76819997 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
60% over limit
Discharged 45.55889962 kg/d against a permitted limit of 28.42039976 kg/d (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2024
Nitrogen, ammonia total [as N]
46% over limit
Discharged 5.84 mg/L against a permitted limit of 4 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
192% over limit
Discharged 5.84 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)