HIGHLAND WASTEWATER TREATMENT FACILITY
NPDES ID: AR0050261
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: 15 effluent violations.
Violations
June 30, 2026
Chlorine, total residual
2536% over limit
Discharged 0.29 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Coliform, fecal general
257% over limit
Discharged 713 MPN/100mL against a permitted limit of 200 MPN/100mL (30DA GEO)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
184% over limit
Discharged 16.11699986 kg/d against a permitted limit of 5.67499995 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
587% over limit
Discharged 68.65 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
348% over limit
Discharged 1790 MPN/100mL against a permitted limit of 400 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
587% over limit
Discharged 68.65 mg/L against a permitted limit of 10 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
30% over limit
Discharged 19.5 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2026
Coliform, fecal general
234% over limit
Discharged 1336 MPN/100mL against a permitted limit of 400 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
Coliform, fecal general
357% over limit
Discharged 913 MPN/100mL against a permitted limit of 200 MPN/100mL (30DA GEO)
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
Solids, total suspended
4% over limit
Discharged 24 mg/L against a permitted limit of 23 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
1082% over limit
Discharged 0.13 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Numeric Violation
April 30, 2026
Coliform, fecal general
Limit violation
Discharged 2074 MPN/100mL against a permitted limit of 200 MPN/100mL (30DA GEO)
DMR, Limited - Numeric Violation
Solids, total suspended
40% over limit
Discharged 21 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
22% over limit
Discharged 28 mg/L against a permitted limit of 23 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrite + Nitrate total [as N]
252% over limit
Discharged 35.24 mg/L against a permitted limit of 10 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
1445% over limit
Discharged 0.17 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
252% over limit
Discharged 35.24 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
173% over limit
Discharged 41 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
130% over limit
Discharged 53 mg/L against a permitted limit of 23 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
115% over limit
Discharged 860 MPN/100mL against a permitted limit of 400 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
53% over limit
Discharged 8.69863993 kg/d against a permitted limit of 5.67499995 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
308% over limit
Discharged 815 MPN/100mL against a permitted limit of 200 MPN/100mL (30DA GEO)
DMR, Limited - Numeric Violation
February 28, 2026
Coliform, fecal general
74% over limit
Discharged 348 MPN/100mL against a permitted limit of 200 MPN/100mL (30DA GEO)
DMR, Limited - Numeric Violation
Coliform, fecal general
97% over limit
Discharged 788 MPN/100mL against a permitted limit of 400 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
Solids, total suspended
22% over limit
Discharged 28 mg/L against a permitted limit of 23 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
60% over limit
Discharged 24 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
718% over limit
Discharged 0.09 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Numeric Violation
January 31, 2026
Solids, total suspended
20% over limit
Discharged 18 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrite + Nitrate total [as N]
269% over limit
Discharged 36.89 mg/L against a permitted limit of 10 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
70% over limit
Discharged 9.62479992 kg/d against a permitted limit of 5.67499995 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
269% over limit
Discharged 36.89 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
1264% over limit
Discharged 0.15 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Numeric Violation
November 30, 2025
Coliform, fecal general
22% over limit
Discharged 244 MPN/100mL against a permitted limit of 200 MPN/100mL (30DA GEO)
DMR, Limited - Numeric Violation
October 31, 2025
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 1374 MPN/100mL against a permitted limit of 200 MPN/100mL (30DA GEO)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrite + Nitrate total [as N]
46% over limit
Discharged 8.29003993 kg/d against a permitted limit of 5.67499995 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
355% over limit
Discharged 0.05 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Coliform, fecal general
62% over limit
Discharged 324 MPN/100mL against a permitted limit of 200 MPN/100mL (30DA GEO)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
220% over limit
Discharged 31.97 mg/L against a permitted limit of 10 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
220% over limit
Discharged 31.97 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Coliform, fecal general
Limit violation
Discharged 2000 MPN/100mL against a permitted limit of 400 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
July 31, 2025
Chlorine, total residual
1173% over limit
Discharged 0.14 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Numeric Violation
June 30, 2025
Chlorine, total residual
1264% over limit
Discharged 0.15 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
35% over limit
Discharged 13.52 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
35% over limit
Discharged 13.52 mg/L against a permitted limit of 10 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Chlorine, total residual
900% over limit
Discharged 0.11 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Numeric Violation
April 30, 2025
Chlorine, total residual
1991% over limit
Discharged 0.23 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Numeric Violation
March 31, 2025
Solids, total suspended
87% over limit
Discharged 28 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
10% over limit
Discharged 11.01 mg/L against a permitted limit of 10 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
45% over limit
Discharged 580 MPN/100mL against a permitted limit of 400 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
Solids, total suspended
100% over limit
Discharged 46 mg/L against a permitted limit of 23 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
107% over limit
Discharged 414 MPN/100mL against a permitted limit of 200 MPN/100mL (30DA GEO)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
10% over limit
Discharged 11.01 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
1082% over limit
Discharged 0.13 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Numeric Violation
February 28, 2025
Chlorine, total residual
3991% over limit
Discharged 0.45 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Coliform, fecal general
29% over limit
Discharged 516 MPN/100mL against a permitted limit of 400 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
January 31, 2025
Chlorine, total residual
3627% over limit
Discharged 0.41 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Numeric Violation
December 31, 2024
Nitrogen, ammonia total [as N]
109% over limit
Discharged 21.5 mg/L against a permitted limit of 10.3 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
3082% over limit
Discharged 0.35 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
50% over limit
Discharged 8.50886793 kg/d against a permitted limit of 5.67499995 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
6% over limit
Discharged 10.9 mg/L against a permitted limit of 10.3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
269% over limit
Discharged 36.9 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
269% over limit
Discharged 36.9 mg/L against a permitted limit of 10 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Chlorine, total residual
3536% over limit
Discharged 0.4 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
10% over limit
Discharged 16.5 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Chlorine, total residual
1991% over limit
Discharged 0.23 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Numeric Violation
September 30, 2024
Nitrite + Nitrate total [as N]
8% over limit
Discharged 6.14715995 kg/d against a permitted limit of 5.67499995 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
3173% over limit
Discharged 0.36 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
140% over limit
Discharged 23.95 mg/L against a permitted limit of 10 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
140% over limit
Discharged 23.95 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2024
Chlorine, total residual
1264% over limit
Discharged 0.15 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 15, 2026 (10 hours ago)