Clean Water Act discharge permit · NPDES MO0100625

HIGH HILL CIRCLE MHP WWTF, Columbia, MO: NPDES MO0100625 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
7Pollutants under a numeric limit
4Pollutants with an effluent exceedance

HIGH HILL CIRCLE MHP WWTF, held by DORIS OVERTON, holds NPDES permit MO0100625, which discharges to Gans Cr.. EPA’s file records it issued March 2, 2007 and expiring March 1, 2012. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	HIGH HILL CIRCLE MHP WWTF
Permittee as filed	DORIS OVERTON
NPDES ID	MO0100625
Permit status	Effective
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	March 2, 2007
Expiration date	March 1, 2012
Issuing agency	MODNR-Northeast Regional Office
Address	Columbia, MO 65201
Receiving water	Gans Cr.
Subwatershed	Bonne Femme Creek (HUC 103001020902)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

9Pollutants on file
7Under a numeric limit
6With a violation of any kind
4With 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
Nitrogen, ammonia total [as N]	0	52	34	December 31, 2023	1,221% over the limit
E. coli, colony forming units [CFU]	0	33	25	September 30, 2023	103,075% over the limit
Solids, total suspended	2	24	4	June 30, 2012	30% over the limit
BOD, 5-day, 20 deg. C	2	23	3	June 30, 2023	24% over the limit
pH	2	18	0
Flow, in conduit or thru treatment plant	2	18	0
Coliform, fecal general	4	0	0
Temperature, water deg. centigrade	2	0	0
Ammonia [as N] + unionized ammonia	2	0	0

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

4Single-event violations

Date	What EPA recorded	Agency
September 18, 2023	Reporting Violations - Failure to Submit DMRs	ST6
May 5, 2021	Management Practice Violations - Improper Operation and Maintenance	ST6
August 24, 2018	Permit Violations - Violation Specified in Comment	ST6
August 24, 2018	Effluent Violations - Numeric effluent violation	ST6

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID MO0100625 there.

Nearby on the register

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

This public-records page covers NPDES permit MO0100625 for the HIGH HILL CIRCLE MHP WWTF in Columbia, MO, held by DORIS OVERTON and discharging to Gans Cr. within the Bonne Femme Creek subwatershed (HUC 103001020902). The page lists 9 pollutants on file, 7 of them under a numeric limit, 6 with a violation of any kind, and 4 with an effluent exceedance.