HOMER, TOWN OF- WASTEWATER TREATMENT PLANT
NPDES ID: LA0038521
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: 10 effluent violations, 2 reporting violations.
Violations
May 31, 2026
Nitrogen, ammonia total [as N]
39% over limit
Discharged 28.37499976 kg/d against a permitted limit of 20.42999983 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
38% over limit
Discharged 31.8 mg/L against a permitted limit of 23 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
100% over limit
Discharged 16 mg/L against a permitted limit of 8 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
390% over limit
Discharged 19.6 mg/L against a permitted limit of 4 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
100% over limit
Discharged 30 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, ammonia total [as N]
168% over limit
Discharged 10.7 mg/L against a permitted limit of 4 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
0% over limit
Discharged 0 mg/L against a permitted limit of 5 mg/L (MO AV MN)
DMR, Limited - Overdue
March 31, 2026
Nitrogen, ammonia total [as N]
34% over limit
Discharged 5.36 mg/L against a permitted limit of 4 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Mercury, total [as Hg]
183% over limit
Discharged 0.0003859 kg/d against a permitted limit of 0.0001362 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Mercury, total [as Hg]
21% over limit
Discharged 0.0003859 kg/d against a permitted limit of 0.0003178 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
91% over limit
Discharged 7.63 mg/L against a permitted limit of 4 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
0% over limit
Discharged 0 mg/L against a permitted limit of 5 mg/L (MO AV MN)
DMR, Limited - Overdue
January 31, 2026
Oxygen, dissolved [DO]
0% over limit
Discharged 0 mg/L against a permitted limit of 5 mg/L (MO AV MN)
DMR, Limited - Overdue
December 31, 2025
Oxygen, dissolved [DO]
0% over limit
Discharged 0 mg/L against a permitted limit of 5 mg/L (MO AV MN)
DMR, Limited - Overdue
Cyanide, total [as CN]
39% over limit
Discharged 0.027694 kg/d against a permitted limit of 0.019976 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Whole Effluent Toxicity [WET] - P. promelas
100% over limit
Discharged 0 % against a permitted limit of 95 % (MO AV MN)
DMR, Limited - Numeric Violation
Chlorine, total residual
2748% over limit
Discharged 0.94 mg/L against a permitted limit of 0.033 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Whole Effluent Toxicity [WET] - P. promelas
100% over limit
Discharged 0 % against a permitted limit of 95 % (7 DA MIN)
DMR, Limited - Numeric Violation
November 30, 2025
Oxygen, dissolved [DO]
0% over limit
Discharged 0 mg/L against a permitted limit of 5 mg/L (MO AV MN)
DMR, Limited - Overdue
October 31, 2025
Whole Effluent Toxicity [WET] - P. promelas
100% over limit
Discharged 0 % against a permitted limit of 95 % (7 DA MIN)
DMR, Limited - Numeric Violation
Whole Effluent Toxicity [WET] - P. promelas
100% over limit
Discharged 0 % against a permitted limit of 95 % (MO AV MN)
DMR, Limited - Numeric Violation
September 30, 2025
Mercury, total [as Hg]
167% over limit
Discharged 0.0003632 kg/d against a permitted limit of 0.0001362 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Whole Effluent Toxicity [WET] - P. promelas
100% over limit
Discharged 0 % against a permitted limit of 95 % (MO AV MN)
DMR, Limited - Numeric Violation
Whole Effluent Toxicity [WET] - P. promelas
100% over limit
Discharged 0 % against a permitted limit of 95 % (7 DA MIN)
DMR, Limited - Numeric Violation
Mercury, total [as Hg]
14% over limit
Discharged 0.0003632 kg/d against a permitted limit of 0.0003178 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2025
pH
0% over limit
Discharged 4.13 SU against a permitted limit of 6 SU (INST MIN)
DMR, Limited - Numeric Violation
Whole Effluent Toxicity [WET] - P. promelas
43% over limit
Discharged 54 % against a permitted limit of 95 % (7 DA MIN)
DMR, Limited - Numeric Violation
Whole Effluent Toxicity [WET] - P. promelas
43% over limit
Discharged 54 % against a permitted limit of 95 % (MO AV MN)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
32% over limit
Discharged 3.42 mg/L against a permitted limit of 5 mg/L (MO AV MN)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, ammonia total [as N]
6% over limit
Discharged 4.24 mg/L against a permitted limit of 4 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
26% over limit
Discharged 3.69 mg/L against a permitted limit of 5 mg/L (MO AV MN)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 4.16 SU against a permitted limit of 6 SU (INST MIN)
DMR, Limited - Numeric Violation
June 30, 2025
Copper, total [as Cu]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.030872 kg/d (MO AVG)
DMR, Limited - Overdue
Solids, total dissolved
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Zinc, total [as Zn]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.26332 kg/d (MO AVG)
DMR, Limited - Overdue
Copper, total [as Cu]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Copper, total [as Cu]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.073094 kg/d (DAILY MX)
DMR, Limited - Overdue
Copper, total [as Cu]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
3% over limit
Discharged 15.4 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Cyanide, total [as CN]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.019976 kg/d (MO AVG)
DMR, Limited - Overdue
Cyanide, total [as CN]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Mercury, total [as Hg]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Zinc, total [as Zn]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (WKLY AVG)
DMR, Monitor Only - Overdue
Zinc, total [as Zn]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.62561199 kg/d (DAILY MX)
DMR, Limited - Overdue
Zinc, total [as Zn]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Mercury, total [as Hg]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.0003178 kg/d (DAILY MX)
DMR, Limited - Overdue
Solids, total dissolved
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (WKLY AVG)
DMR, Monitor Only - Overdue
Oxygen, dissolved [DO]
35% over limit
Discharged 3.25 mg/L against a permitted limit of 5 mg/L (MO AV MN)
DMR, Limited - Numeric Violation
Cyanide, total [as CN]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.047216 kg/d (DAILY MX)
DMR, Limited - Overdue
Solids, total dissolved
0% over limit
Discharged 0 kg/d against a permitted limit of 3579.78996992 kg/d (WKLY AVG)
DMR, Limited - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (WKLY AVG)
DMR, Monitor Only - Overdue
Mercury, total [as Hg]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.0001362 kg/d (MO AVG)
DMR, Limited - Overdue
Solids, total dissolved
0% over limit
Discharged 0 kg/d against a permitted limit of 1504.10198736 kg/d (MO AVG)
DMR, Limited - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 0 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Cyanide, total [as CN]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Mercury, total [as Hg]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
May 31, 2025
pH
0% over limit
Discharged 3.25 SU against a permitted limit of 6 SU (INST MIN)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
37% over limit
Discharged 3.14 mg/L against a permitted limit of 5 mg/L (MO AV MN)
DMR, Limited - Numeric Violation
April 30, 2025
Coliform, fecal general
844% over limit
Discharged 1888 MPN/100mL against a permitted limit of 200 MPN/100mL (MOAV GEO)
DMR, Limited - Numeric Violation
Solids, total suspended
97% over limit
Discharged 29.6 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
640% over limit
Discharged 2960 MPN/100mL against a permitted limit of 400 MPN/100mL (WKAV GEO)
DMR, Limited - Numeric Violation
Solids, total suspended
83% over limit
Discharged 139.37799883 kg/d against a permitted limit of 76.27199936 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
67% over limit
Discharged 38.5 mg/L against a permitted limit of 23 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Coliform, fecal general
104% over limit
Discharged 816 MPN/100mL against a permitted limit of 400 MPN/100mL (WKAV GEO)
DMR, Limited - Numeric Violation
Mercury, total [as Hg]
633% over limit
Discharged 0.0009988 kg/d against a permitted limit of 0.0001362 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
79% over limit
Discharged 0.055388 kg/d against a permitted limit of 0.030872 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Mercury, total [as Hg]
214% over limit
Discharged 0.0009988 kg/d against a permitted limit of 0.0003178 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Coliform, fecal general
248% over limit
Discharged 695 MPN/100mL against a permitted limit of 200 MPN/100mL (MOAV GEO)
DMR, Limited - Numeric Violation
Cyanide, total [as CN]
105% over limit
Discharged 0.04086 kg/d against a permitted limit of 0.019976 kg/d (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Coliform, fecal general
479% over limit
Discharged 1157 MPN/100mL against a permitted limit of 200 MPN/100mL (MOAV GEO)
DMR, Limited - Numeric Violation
Coliform, fecal general
Limit violation
Discharged 1600 MPN/100mL against a permitted limit of 400 MPN/100mL (WKAV GEO)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
1% over limit
Discharged 4.97 mg/L against a permitted limit of 5 mg/L (MO AV MN)
DMR, Limited - Numeric Violation
January 31, 2025
Coliform, fecal general
70% over limit
Discharged 680 MPN/100mL against a permitted limit of 400 MPN/100mL (WKAV GEO)
DMR, Limited - Numeric Violation
December 31, 2024
Whole Effluent Toxicity [WET] - C. dubia
100% over limit
Discharged 0 % against a permitted limit of 95 % (7 DA MIN)
DMR, Limited - Numeric Violation
Whole Effluent Toxicity [WET] - C. dubia
100% over limit
Discharged 0 % against a permitted limit of 95 % (MO AV MN)
DMR, Limited - Numeric Violation
October 31, 2024
Whole Effluent Toxicity [WET] - C. dubia
24% over limit
Discharged 72 % against a permitted limit of 95 % (7 DA MIN)
DMR, Limited - Numeric Violation
Whole Effluent Toxicity [WET] - C. dubia
24% over limit
Discharged 72 % against a permitted limit of 95 % (MO AV MN)
DMR, Limited - Numeric Violation
September 30, 2024
Mercury, total [as Hg]
167% over limit
Discharged 0.0003632 kg/d against a permitted limit of 0.0001362 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Whole Effluent Toxicity [WET] - C. dubia
24% over limit
Discharged 72 % against a permitted limit of 95 % (MO AV MN)
DMR, Limited - Numeric Violation
Mercury, total [as Hg]
14% over limit
Discharged 0.0003632 kg/d against a permitted limit of 0.0003178 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Whole Effluent Toxicity [WET] - C. dubia
24% over limit
Discharged 72 % against a permitted limit of 95 % (7 DA MIN)
DMR, Limited - Numeric Violation
August 31, 2024
Whole Effluent Toxicity [WET] - P. promelas
100% over limit
Discharged 0 % against a permitted limit of 95 % (7 DA MIN)
DMR, Limited - Numeric Violation
Whole Effluent Toxicity [WET] - P. promelas
100% over limit
Discharged 0 % against a permitted limit of 95 % (MO AV MN)
DMR, Limited - Numeric Violation
Whole Effluent Toxicity [WET] - C. dubia
68% over limit
Discharged 30 % against a permitted limit of 95 % (7 DA MIN)
DMR, Limited - Numeric Violation
Whole Effluent Toxicity [WET] - C. dubia
68% over limit
Discharged 30 % against a permitted limit of 95 % (MO AV MN)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (4 days ago)