Clean Water Act discharge permit · NPDES NE0021164

CLARKSON WWTF, Clarkson, NE: NPDES NE0021164 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
11Pollutants under a numeric limit
6Pollutants with an effluent exceedance

CLARKSON WWTF, held by Clarkson WWTF, holds NPDES permit NE0021164, which discharges to W Fk Maple Creek. EPA’s file records it issued April 1, 2019 and expiring March 31, 2024. 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	CLARKSON WWTF
Permittee as filed	Clarkson WWTF
NPDES ID	NE0021164
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	April 1, 2019
Expiration date	March 31, 2024
Address	Clarkson, NE 68629
Receiving water	W FK MAPLE CREEK
Subwatershed	Middle West Fork Maple Creek (HUC 102200030503)

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

Effluent limits and exceedances

14Pollutants on file
11Under a numeric limit
13With a violation of any kind
6With 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]	12	314	57	April 30, 2024	1,609% over the limit
BOD, carbonaceous [5 day, 20 C]	0	185	27	April 30, 2013	128% over the limit
Solids, total suspended	5	275	14	October 31, 2021	321% over the limit
BOD, 5-day, 20 deg. C	5	112	9	October 31, 2025	108% over the limit
Oxygen, dissolved [DO]	0	3	3	May 31, 2008	61% over the limit
pH	3	139	2	October 31, 2011
Flow, in conduit or thru treatment plant	3	136	0
Duration of discharge	1	65	0
Nitrogen, total [as N]	2	52	0
Phosphorus, total [as P]	2	52	0
Temperature, water deg. fahrenheit	2	50	0
E. coli	0	42	0
E. coli, MTEC-MF	2	18	0
Flow, total	1	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

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES NE0021164.

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, NE0021164.

Start the watch

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 NE0021164 there.

Nearby on the register

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