CURRYVILLE WWTF
NPDES ID: MO0040801
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: 6 effluent violations, 1 single-event violation.
Violations
May 31, 2026
E. coli
215% over limit
Discharged 648.8 MPN/100mL against a permitted limit of 206 MPN/100mL (30DA GM)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
129% over limit
Discharged 20 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
BOD, 5-day, percent removal
23% over limit
Discharged 57 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
Solids, total suspended
33% over limit
Discharged 160 mg/L against a permitted limit of 120 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
100% over limit
Discharged 160 mg/L against a permitted limit of 80 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
E. coli
347% over limit
Discharged 920.8 MPN/100mL against a permitted limit of 206 MPN/100mL (30DA GM)
DMR, Limited - Numeric Violation
March 31, 2026
Solids, total suspended
50% over limit
Discharged 120 mg/L against a permitted limit of 80 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oil and grease [soxhlet extr.] tot.
314% over limit
Discharged 41.38 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oil and grease [soxhlet extr.] tot.
176% over limit
Discharged 41.38 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
Solids, suspended percent removal
114% over limit
Discharged 25 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
Solids, total suspended
133% over limit
Discharged 280 mg/L against a permitted limit of 120 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
10% over limit
Discharged 49.4 mg/L against a permitted limit of 45 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
163% over limit
Discharged 210 mg/L against a permitted limit of 80 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Toxicity [acute], Ceriodaphnia dubia
0% over limit
Discharged 0 toxic against a permitted limit of 0 toxic (DAILY MX)
DMR, Monitor Only - Overdue
Toxicity [acute], Pimephales promelas [Fathead Minnow]
0% over limit
Discharged 0 toxic against a permitted limit of 0 toxic (DAILY MX)
DMR, Monitor Only - Overdue
July 31, 2025
E. coli
135% over limit
Discharged 2419 MPN/100mL against a permitted limit of 1030 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
E. coli
1074% over limit
Discharged 2419 MPN/100mL against a permitted limit of 206 MPN/100mL (30DA GM)
DMR, Limited - Numeric Violation
June 30, 2025
E. coli
321% over limit
Discharged 866.4 MPN/100mL against a permitted limit of 206 MPN/100mL (30DA GM)
DMR, Limited - Numeric Violation
May 31, 2025
Solids, total suspended
5% over limit
Discharged 84 mg/L against a permitted limit of 80 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Solids, total suspended
92% over limit
Discharged 230 mg/L against a permitted limit of 120 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
188% over limit
Discharged 230 mg/L against a permitted limit of 80 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
49% over limit
Discharged 4.03 mg/L against a permitted limit of 2.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2025
BOD, 5-day, 20 deg. C
20% over limit
Discharged 53.9 mg/L against a permitted limit of 45 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oil and grease [soxhlet extr.] tot.
97% over limit
Discharged 29.51 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Oil and grease [soxhlet extr.] tot.
195% over limit
Discharged 29.51 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Solids, total suspended
250% over limit
Discharged 420 mg/L against a permitted limit of 120 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
425% over limit
Discharged 420 mg/L against a permitted limit of 80 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Oil and grease [soxhlet extr.] tot.
10% over limit
Discharged 11.02 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
50% over limit
Discharged 120 mg/L against a permitted limit of 80 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)