Clean Water Act discharge permit · NPDES MO0122581

IRON MOUNTAIN LAKE WWTF, Iron Mountain, MO: NPDES MO0122581 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
11Pollutants under a numeric limit
7Pollutants with an effluent exceedance

IRON MOUNTAIN LAKE WWTF, held by Iron Mountain Lake, City of, holds NPDES permit MO0122581, which discharges to Indian Cr.. EPA’s file records it issued May 17, 2018 and expiring March 31, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	IRON MOUNTAIN LAKE WWTF
Permittee as filed	Iron Mountain Lake, City of
NPDES ID	MO0122581
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 17, 2018
Expiration date	March 31, 2022
Address	Iron Mountain, MO 63624
Receiving water	Indian Cr.
Subwatershed	Headwaters St Francis River (HUC 080202020201)

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

Effluent limits and exceedances

12Pollutants on file
11Under a numeric limit
12With a violation of any kind
7With 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]	4	236	220	July 31, 2026	793% over the limit
E. coli	2	80	58	July 31, 2026	137,202% over the limit
BOD, 5-day, 20 deg. C	2	79	56	February 28, 2026	380% over the limit
BOD, 5-day, percent removal	1	29	26	March 31, 2026	460% over the limit
Solids, total suspended	2	35	12	November 30, 2024	120% over the limit
Solids, suspended percent removal	1	11	8	May 31, 2025	133% over the limit
pH	2	20	2	August 31, 2019
Flow, in conduit or thru treatment plant	2	18	0
Oil and grease [soxhlet extr.] tot.	2	2	0
Coliform, fecal general	0	2	0
Toxicity [acute], Ceriodaphnia dubia	1	1	0
Toxicity [acute], Pimephales promelas [Fathead Minnow]	1	1	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

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES MO0122581.

Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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, MO0122581.

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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 MO0122581 there.

Nearby on the register

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