Velarion Records
Follow this permit Velarion Records emails you this permit’s record, cited to the public filing, and tells you when the register changes it. Free.
We’ll email you a link to confirm. The continuous daily watch on every change is the paid alert. Unsubscribe any time.
Also free: The Pay Desk, the weekly executive pay briefing.

Clean Water Act discharge permit · NPDES MO0081035

WINDFALL ESTATES MHP WWTP, Catawissa, MO: NPDES MO0081035 discharge permit, effluent exceedances, inspections, penalties

WINDFALL ESTATES MHP WWTP, held by Meridian Enterprises II, LLC, holds NPDES permit MO0081035, which discharges to Tributary To Meramec River. EPA’s file records it issued July 6, 2018 and expiring June 30, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedWINDFALL ESTATES MHP WWTP
Permittee as filedMeridian Enterprises II, LLC
NPDES IDMO0081035
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedJuly 6, 2018
Expiration dateJune 30, 2023
AddressCatawissa, MO 63015
Receiving waterTributary to Meramec River
SubwatershedBrush Creek-Meramec River (HUC 071401020902)
SIC6515 – Mobile Home Site Operators

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

Effluent limits and exceedances

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 measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Nitrogen, ammonia total [as N]63628June 30, 20263,008% over the limit
BOD, 5-day, 20 deg. C22210March 31, 2026127% over the limit
E. coli, colony forming units [CFU]0119September 30, 201661,011% over the limit
Chlorine, total residual0108September 30, 20162,005% over the limit
Solids, total suspended2197September 30, 2025213% over the limit
E. coli295December 31, 20245,725% over the limit
Coliform, fecal general022October 31, 20102,499,900% over the limit
pH2131December 31, 2011
Flow, in conduit or thru treatment plant2220
Ammonia [as N] + unionized ammonia040

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

DateWhat EPA recordedAgency
October 14, 2025Effluent Violations - Narrative Effluent ViolationST6
October 14, 2025Effluent Violations - Numeric effluent violationST6
July 31, 2025Effluent Violations - Numeric effluent violationST6
January 5, 2024Effluent Violations - Numeric effluent violationST6
November 1, 2023Effluent Violations - Numeric effluent violationST6
November 1, 2023Effluent Violations - Narrative Effluent ViolationST6
November 1, 2023Reporting Violations - Improper/ Incorrect ReportingST6
September 28, 2023Effluent Violations - Numeric effluent violationST6
May 4, 2023Effluent Violations - Numeric effluent violationST6
May 4, 2023Reporting Violations - Improper/ Incorrect ReportingST6
May 4, 2023Effluent Violations - Narrative Effluent ViolationST6
June 24, 2021Effluent Violations - Numeric effluent violationST6
June 24, 2021Effluent Violations - Narrative Effluent ViolationST6
September 29, 2020Effluent Violations - Narrative Effluent ViolationST6
September 29, 2020Reporting Violations - Failure to submit required report (non-DMR non-pretreatment)ST6
January 14, 2020Effluent Violations - Numeric effluent violationST6
January 14, 2020Management Practice Violations - Improper Operation and MaintenanceST6
September 6, 2019Management Practice Violations - Improper Operation and MaintenanceST6

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.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MO0081035.

Start the watch

How often?
  • One permit holder — $99/month
  • One watershed — $2,990/year
  • One state — $4,990/year
  • The whole register — $18,000/year

How we handle your data → Privacy

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 MO0081035 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

What this page shows

This public-records page covers Clean Water Act discharge permit NPDES MO0081035 for the WINDFALL ESTATES MHP WWTP in Catawissa, MO, held by Meridian Enterprises II, LLC, which discharges to Tributary To Meramec River. The page lists 6 for the discharger class, 8 pollutants under a numeric limit, and 8 pollutants with an effluent exceedance, and it shows the permit as administratively continued.