HARMONY GROVE PUBLIC SCHOOL
NPDES ID: AR0050105
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: 4 effluent violations.
Violations
April 30, 2026
Nitrogen, ammonia total [as N]
187% over limit
Discharged 17.5 mg/L against a permitted limit of 6.1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
187% over limit
Discharged 17.5 mg/L against a permitted limit of 6.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
75% over limit
Discharged 0.63559999 kg/d against a permitted limit of 0.3632 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
19% over limit
Discharged 0.4313 kg/d against a permitted limit of 0.3632 kg/d (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
158% over limit
Discharged 25.8 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
120% over limit
Discharged 33 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
163% over limit
Discharged 2.26545998 kg/d against a permitted limit of 0.86259999 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
BOD, carbonaceous [5 day, 20 C]
16% over limit
Discharged 17.33 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
23% over limit
Discharged 28.3 mg/L against a permitted limit of 23 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
43% over limit
Discharged 1.82053998 kg/d against a permitted limit of 1.27119999 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
Solids, total suspended
458% over limit
Discharged 9.62479992 kg/d against a permitted limit of 1.7252 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 4.7 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Numeric Violation
Solids, total suspended
326% over limit
Discharged 4.83055996 kg/d against a permitted limit of 1.135 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
287% over limit
Discharged 116 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
480% over limit
Discharged 116 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
pH
0% over limit
Discharged 4.1 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Numeric Violation
March 31, 2025
Coliform, fecal general
Limit violation
Discharged 2420 MPN/100mL against a permitted limit of 2000 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
Coliform, fecal general
128% over limit
Discharged 2275.3 MPN/100mL against a permitted limit of 1000 MPN/100mL (30DA GEO)
DMR, Limited - Numeric Violation
October 31, 2024
pH
0% over limit
Discharged 3.6 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)