Clean Water Act discharge permit · NPDES MO0134619

RIDGE CREEK ESTATES WWTP, Rolla, MO: NPDES MO0134619 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
9Pollutants under a numeric limit
5Pollutants with an effluent exceedance

RIDGE CREEK ESTATES WWTP, held by Ridge Creek HOA, holds NPDES permit MO0134619, which discharges to L. Dry Fk.. EPA’s file records it issued October 10, 2012 and expiring October 9, 2017. 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	RIDGE CREEK ESTATES WWTP
Permittee as filed	Ridge Creek HOA
NPDES ID	MO0134619
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	October 10, 2012
Expiration date	October 9, 2017
Issuing agency	MODNR-Water Protection Program
Address	Rolla, MO 65401
Receiving water	L. Dry Fk.
Subwatershed	Little Dry Fork-Dry Fork (HUC 071401020108)

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

Effluent limits and exceedances

9Pollutants on file
9Under a numeric limit
9With a violation of any kind
5With 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
E. coli, colony forming units [CFU]	3	51	18	December 31, 2016	511% over the limit
E. coli	3	61	7	December 31, 2022	99,999% over the limit
Nitrogen, ammonia total [as N]	4	42	6	September 30, 2023	697% over the limit
BOD, 5-day, 20 deg. C	2	13	1	December 31, 2016	15% over the limit
pH	2	13	1	September 30, 2016
Ammonia [as N] + unionized ammonia	4	24	0
Temperature, water deg. centigrade	2	12	0
Solids, total suspended	2	12	0
Flow, in conduit or thru treatment plant	2	12	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

2Single-event violations

Date	What EPA recorded	Agency
February 14, 2020	Permit Violations - Violation Specified in Comment	ST6
February 14, 2020	Management Practice Violations - Improper Operation and Maintenance	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 MO0134619 there.

Nearby on the register

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

This public-records page covers NPDES permit MO0134619 for the RIDGE CREEK ESTATES WWTP in Rolla, MO, held by Ridge Creek HOA and discharging to L. Dry Fk. in the Little Dry Fork-Dry Fork subwatershed (HUC 071401020108). The permit is listed as administratively continued, with a Minor Discharger class, 9 pollutants on file, 9 under a numeric limit, and 5 with an effluent exceedance.