Clean Water Act discharge permit · NPDES MO0056278

CANTON WWTF, Canton, MO: NPDES MO0056278 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
15Pollutants under a numeric limit
8Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

CANTON WWTF, held by City of Canton, holds NPDES permit MO0056278, which discharges to Tributary To Mississippi R.. EPA’s file records it issued May 14, 2013 and expiring May 31, 2018.

CANTON WWTF, Canton, Missouri: Individual permit MO0056278, held by City of Canton; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued May 14, 2013, term to May 31, 2018; discharges to Tributary to Mississippi R..

Peracetic Acid: 2 limits, 39 violations of any kind, 31 effluent exceedances, latest October 31, 2020, largest 99,999% over the limit.
E. coli, colony forming units [CFU]: 2 limits, 14 violations of any kind, 12 effluent exceedances, latest October 31, 2018, largest 190% over the limit.
BOD, 5-day, percent removal: 0 limits, 11 violations of any kind, 8 effluent exceedances, latest April 30, 2026, largest 186% over the limit.
Solids, suspended percent removal: 0 limits, 7 violations of any kind, 4 effluent exceedances, latest March 31, 2023, largest 94% over the limit.
pH: 1 limit, 28 violations of any kind, 3 effluent exceedances, latest May 31, 2023.
Solids, total suspended: 2 limits, 14 violations of any kind, 3 effluent exceedances, latest April 30, 2025, largest 32% over the limit.
BOD, 5-day, 20 deg. C: 2 limits, 12 violations of any kind, 2 effluent exceedances, latest April 30, 2025, largest 43% over the limit.
E. coli: 0 limits, 7 violations of any kind, 1 effluent exceedance, latest June 30, 2021, largest 1% over the limit.
Nitrogen, ammonia total [as N]: 4 limits, 8 violations of any kind, 0 effluent exceedances.
Oil and grease [soxhlet extr.] tot.: 2 limits, 8 violations of any kind, 0 effluent exceedances.
Nitrogen, total [as N]: 2 limits, 8 violations of any kind, 0 effluent exceedances.
Phosphorus, total [as P]: 2 limits, 8 violations of any kind, 0 effluent exceedances.
Flow, in conduit or thru treatment plant: 2 limits, 8 violations of any kind, 0 effluent exceedances.
Toxicity [acute], Ceriodaphnia dubia: 1 limit, 1 violation of any kind, 0 effluent exceedances.
Toxicity [acute], Pimephales promelas [Fathead Minnow]: 1 limit, 1 violation of any kind, 0 effluent exceedances.
Nitrogen, nitrite total [as N]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
Nitrogen, nitrate total [as N]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
Nitrogen, Kjeldahl, total [as N]: 2 limits, 0 violations of any kind, 0 effluent exceedances.

May 12, 2023: Permit Violations - Violation Specified in Comment (ST6).
May 12, 2023: Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) (ST6).
May 12, 2023: Effluent Violations - Numeric effluent violation (ST6).
December 27, 2019: Reporting Violations - Failure to Submit DMRs (ST6).
December 27, 2019: Effluent Violations - Numeric effluent violation (ST6).
September 26, 2018: Permit Violations - Violation Specified in Comment (ST6).
September 26, 2018: Reporting Violations - Improper/ Incorrect Reporting (ST6).
September 26, 2018: Management Practice Violations - Improper Operation and Maintenance (ST6).
September 26, 2018: Effluent Violations - Numeric effluent violation (ST6).

Missouri holds 756 Publicly owned treatment works coverages of this permit type in EPA’s file; 8 were issued before MO0056278. City of Canton holds 2 permits in Missouri.

Other permits held by City of Canton

CANTON WATER TREATMENT PLANT, Canton: MOG640078, issued April 1, 2024

Coverages issued nearest MO0056278

December 18, 2009: GALLATIN WWTP, Gallatin, MO0027812, held by City of Gallatin
January 9, 2013: DREXEL SOUTH WWTF, Drexel, MO0023663, held by City of Drexel
January 9, 2013: EXCELSIOR SPRINGS WWTF, Excelsior Springs, MO0028843, held by City of Excelsior Springs
April 24, 2013: VALLE LAKE SEWER DISTRICT WWTP, De Soto, MO0100749, held by Valle Lake Sewer District of Jeff Co
May 13, 2013: HOPKINS WWTF, Hopkins, MO0054755, held by City of Hopkins
October 9, 2013: LEXINGTON WWTF, Lexington, MO0025216, held by City of Lexington
October 18, 2013: ROLLA VICHY ROAD WWTP, Rolla, MO0047031, held by City of Rolla
December 5, 2013: ODESSA WEST WWTF, Odessa, MO0026395, held by City of Odessa
December 6, 2013: HARDIN WWTF, Hardin, MO0046655, held by City of Hardin
December 6, 2013: RICHMOND SOUTH WWTP, Richmond, MO0100200, held by City of Richmond

CANTON WWTF among its neighbors

EPA’s permit file holds 5 discharge permits in the Buck Run-Mississippi River subwatershed (HUC 071100010605), MO0056278 among them. Its county holds 31, 0 of them major permits; MO0056278 is a minor permit.

Other permits in the Buck Run-Mississippi River subwatershed (HUC 071100010605)

CANTON R-V SCHOOL DISTRICT, Canton: MORA25675, minor permit, discharging to Tributary to Mississippi R., permit term to February 7, 2027
IDEAL READY MIX CO INC CANTON PLANT, Canton: MOG490584, minor permit, discharging to Tributary to Mississippi R., permit term to April 30, 2027
US WELLNESS MEATS, Canton: MORA24993, minor permit, discharging to Tributary to Mississippi R., permit term to February 7, 2027
WESTPORT APARTMENTS WWTP, Canton: MO0110582, minor permit, discharging to Tributary to Buck Run, permit term to June 30, 2023

Identity

Facility as filed	CANTON WWTF
Permittee as filed	City of Canton
NPDES ID	MO0056278
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	May 14, 2013
Expiration date	May 31, 2018
Address	Canton, MO 63435
Receiving water	Tributary to Mississippi R.
Receiving water impaired	303(D) Listed
Subwatershed	Buck Run-Mississippi River (HUC 071100010605)

Effluent limits and exceedances

18Pollutants on file
15Under a numeric limit
15With a violation of any kind
8With an effluent exceedance

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Peracetic Acid	2	39	31	October 31, 2020	99,999% over the limit
E. coli, colony forming units [CFU]	2	14	12	October 31, 2018	190% over the limit
BOD, 5-day, percent removal	0	11	8	April 30, 2026	186% over the limit
Solids, suspended percent removal	0	7	4	March 31, 2023	94% over the limit
pH	1	28	3	May 31, 2023
Solids, total suspended	2	14	3	April 30, 2025	32% over the limit
BOD, 5-day, 20 deg. C	2	12	2	April 30, 2025	43% over the limit
E. coli	0	7	1	June 30, 2021	1% over the limit
Nitrogen, ammonia total [as N]	4	8	0
Oil and grease [soxhlet extr.] tot.	2	8	0
Nitrogen, total [as N]	2	8	0
Phosphorus, total [as P]	2	8	0
Flow, in conduit or thru treatment plant	2	8	0
Toxicity [acute], Ceriodaphnia dubia	1	1	0
Toxicity [acute], Pimephales promelas [Fathead Minnow]	1	1	0
Nitrogen, nitrite total [as N]	2	0	0
Nitrogen, nitrate total [as N]	2	0	0
Nitrogen, Kjeldahl, total [as N]	2	0	0

Inspections, violations and enforcement

9Single-event violations

Date	What EPA recorded	Agency
May 12, 2023	Permit Violations - Violation Specified in Comment	ST6
May 12, 2023	Reporting Violations - Failure to submit required report (non-DMR non-pretreatment)	ST6
May 12, 2023	Effluent Violations - Numeric effluent violation	ST6
December 27, 2019	Reporting Violations - Failure to Submit DMRs	ST6
December 27, 2019	Effluent Violations - Numeric effluent violation	ST6
September 26, 2018	Permit Violations - Violation Specified in Comment	ST6
September 26, 2018	Reporting Violations - Improper/ Incorrect Reporting	ST6
September 26, 2018	Management Practice Violations - Improper Operation and Maintenance	ST6
September 26, 2018	Effluent Violations - Numeric effluent violation	ST6

Inspections

EPA’s inspection file holds no inspection for NPDES MO0056278.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES MO0056278.

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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

This public-records page covers the NPDES discharge permit MO0056278 for the CANTON WWTF in Canton, MO, held by City of Canton and listed as administratively continued, with a minor discharger classification. The page lists 18 pollutants on file, 15 under a numeric limit, 15 with a violation of any kind, and 8 with an effluent exceedance.