DE SOTO WWTP

Address

9511 HWY P
DE SOTO, MO 63020
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County

JEFFERSON County

Inspections

1 · last Jul 31, 2025

Total Penalties

$0

Registry ID

110039799386

Compliance Status (Last 12 Quarters)

Number of calendar quarters, out of the last 12, in which this facility was in violation of its permit. Zero means no recorded violations in that program over the past three years.

3

Water (CWA)
Qtrs Non-Compliant

Compliance Violations

Individual permit violations recorded by the EPA across air, water, and hazardous waste programs. Open violations are unresolved as of the most recent ECHO data update.

Program	Type	Violation Date	Return to Compliance	Status
cwa	Permit Violations - Failure to Submit Timely Permit Renewal Application	Sep 18, 2025	Sep 18, 2025	Resolved
cwa	Schedule Event achieved late but reported	Jan 28, 2021	—	Open
cwa	Schedule Event reported late	Jan 28, 2021	—	Open
cwa	Schedule Event unachieved and not reported	Jan 28, 2021	May 24, 2021	Resolved
cwa	Schedule Event unachieved but reported	Jan 28, 2021	May 24, 2021	Resolved
cwa	Reporting Violations - Improper/ Incorrect Reporting	Jul 17, 2020	Jul 31, 2025	Resolved
cwa	Schedule Event unachieved and not reported	Jan 28, 2019	Jul 15, 2019	Resolved
cwa	Schedule Event unachieved but reported	Jan 28, 2019	Jul 15, 2019	Resolved
cwa	Schedule Event achieved late but reported	Jan 28, 2019	—	Open
cwa	Schedule Event reported late	Jan 28, 2019	—	Open
cwa	Schedule Event reported late	Nov 28, 2011	—	Open
cwa	Schedule Event unachieved but reported	Nov 28, 2011	Apr 9, 2012	Resolved
cwa	Schedule Event unachieved and not reported	Nov 28, 2011	Apr 9, 2012	Resolved
cwa	Schedule Event achieved late but reported	Nov 28, 2011	—	Open

Discharge Limit Exceedances

Instances where this facility's reported discharge monitoring results exceeded its permitted limits under the Clean Water Act. Exceedance percentage shows how far over the permit limit the discharge was.

Pollutant	Violation	Reported	Limit	Exceedance	Period	Status
BOD, 5-day, percent removal	DMR, Limited - Numeric Violation	74.79 %	85.00	+68%	Apr 2025	Open
Solids, suspended percent removal	DMR, Limited - Numeric Violation	77.69 %	85.00	+49%	Mar 2023	Open
BOD, 5-day, percent removal	DMR, Limited - Numeric Violation	75.28 %	85.00	+65%	Feb 2023	Open
BOD, 5-day, percent removal	DMR, Limited - Numeric Violation	83.00 %	85.00	+13%	Nov 2022	Open
BOD, 5-day, 20 deg. C	DMR, Limited - Numeric Violation	72.00 mg/L	45.00	+60%	Sep 2021	Open
BOD, 5-day, percent removal	DMR, Limited - Numeric Violation	76.53 %	85.00	+56%	Feb 2021	Open
BOD, 5-day, 20 deg. C	DMR, Limited - Numeric Violation	76.00 mg/L	45.00	+69%	Nov 2019	Open
Solids, total suspended	DMR, Limited - Numeric Violation	960.00 mg/L	45.00	+2,033%	Aug 2019	Open
BOD, 5-day, percent removal	DMR, Limited - Numeric Violation	73.36 %	85.00	+78%	Nov 2018	Open
Solids, total suspended	DMR, Limited - Numeric Violation	204.00 mg/L	45.00	+353%	Aug 2018	Open
Solids, total suspended	DMR, Limited - Numeric Violation	150.00 mg/L	30.00	+400%	Aug 2018	Open
Nitrogen, ammonia total [as N]	DMR, Limited - Numeric Violation	7.28 mg/L	5.80	+26%	May 2015	Open
Nitrogen, ammonia total [as N]	DMR, Limited - Numeric Violation	1.86 mg/L	1.40	+33%	May 2015	Open

Enforcement Actions

Formal enforcement cases brought by the EPA or state agencies, including administrative orders and civil penalties assessed. Penalty amounts reflect what was formally assessed, not necessarily what was collected.

CWA 309A AO For Compliance

Clean Water Act · Case 07-1999-N013 · Sep 30, 1999

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