Clean Water Act discharge permit · NPDES OR0020737

DALLAS STP, Dallas, OR: NPDES OR0020737 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MajorDischarger class
18Pollutants under a numeric limit
9Pollutants with an effluent exceedance

DALLAS STP, held by DALLAS, CITY OF, holds NPDES permit OR0020737, which discharges to Rickreall Creek. EPA’s file records it issued January 5, 1998 and expiring December 31, 2013. 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	DALLAS STP
Permittee as filed	DALLAS, CITY OF
NPDES ID	OR0020737
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Major discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	January 5, 1998
Expiration date	December 31, 2013
Address	Dallas, OR 97338
Receiving water	RICKREALL CREEK
Receiving water impaired	303(D) Listed
Subwatershed	Lower Rickreall Creek (HUC 170900070106)

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

Effluent limits and exceedances

21Pollutants on file
18Under a numeric limit
19With a violation of any kind
9With 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]	6	27	12	July 31, 2026	581% over the limit
Solids, total suspended	21	72	4	February 28, 2014	77% over the limit
BOD, carbonaceous [5 day, 20 C]	21	71	2	July 31, 2020	164% over the limit
pH, minimum	1	5	2	June 30, 2024
E. coli	4	22	1	March 31, 2006	176% over the limit
Oxygen, dissolved [DO]	1	6	1	August 31, 2004	2% over the limit
E. coli, MTEC-MF	0	1	1	September 30, 1999	10% over the limit
pH range excursions, > 60 minutes	0	1	1	February 28, 2026	2,147,483,650% over the limit
pH range excursions, monthly total accum	0	1	1	February 28, 2026	95% over the limit
BOD, carbonaceous, percent removal	3	168	0
Solids, suspended percent removal	3	167	0
pH	2	5	0
Flow rate	1	4	0
pH, maximum	1	4	0
Ultraviolet light transmittance	4	2	0
Flow, in conduit or thru treatment plant	1	2	0
Temperature, water deg. centigrade	6	1	0
Nitrogen, Kjeldahl, total [as N]	4	1	0
Phosphate, total [as PO4]	4	1	0
Nitrite + Nitrate total [as N]	4	0	0
Report due [yrmoda]	3	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

2Single-event violations

Date	What EPA recorded	Agency
December 26, 2024	WW SSO - Discharge to Waters	ST6
June 1, 2024	Reporting Violations - Failure to Notify	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.

Watch this permit

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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 OR0020737 there.

Nearby on the register

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

This EPA public-records page covers NPDES permit OR0020737 for the DALLAS STP, a publicly owned treatment works in Dallas, OR, held by DALLAS, CITY OF and discharging to Rickreall Creek, a receiving water listed as impaired under 303(d). The permit is administratively continued and classed as a major discharger, with 21 pollutants on file, 18 under a numeric limit, 19 with a violation of any kind, and 9 with an effluent exceedance.