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Clean Water Act discharge permit · NPDES LA0036323

RUSTON, CITY OF- NORTHSIDE WASTEWATER TREATMENT PLANT, Ruston, LA: NPDES LA0036323 discharge permit, effluent exceedances, inspections, penalties

RUSTON, CITY OF- NORTHSIDE WASTEWATER TREATMENT PLANT, held by City of Ruston- Northside Wastewater Treatment Plant, holds NPDES permit LA0036323, which discharges to Colvin Ck-Cypress Ck-Bayou D'Arbonn. EPA’s file records it issued July 20, 2017 and expiring July 19, 2022. 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 filedRUSTON, CITY OF- NORTHSIDE WASTEWATER TREATMENT PLANT
Permittee as filedCity of Ruston- Northside Wastewater Treatment Plant
NPDES IDLA0036323
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedJuly 20, 2017
Expiration dateJuly 19, 2022
AddressRuston, LA 71273
Receiving waterCOLVIN CK-CYPRESS CK-BAYOU D'ARBONN
Receiving water impaired303(D) Listed
SubwatershedUpper Cypress Creek (HUC 080402060706)

Cited to the EPA ICIS-NPDES permit file (ECHO 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]310588January 31, 2008509% over the limit
Solids, total suspended37773December 31, 2024750% over the limit
Sulfate, total [as SO4]125855June 30, 2026204% over the limit
BOD, carbonaceous [5 day, 20 C]34637January 31, 2008300% over the limit
Solids, total dissolved123333March 31, 20267,019% over the limit
Whole effluent toxicity03630June 30, 2010100% over the limit
Coliform, fecal general23028January 31, 202499,999% over the limit
pH266October 31, 2015
Mercury, total [as Hg]044January 31, 2003233% over the limit
Copper, total [as Cu]873December 31, 2024202% over the limit
Chlorine, total residual053July 31, 2003991% over the limit
Zinc, total [as Zn]062October 31, 200432% over the limit
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas4160
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas4160
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas4160
Pass/Fail Static Renewal 7Day Chronic Pimephales promelas4100
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia4100
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia4100
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia4100
Coef Of Var Static Renewal 7Day Chronic Pimephales promelas250
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia440
Flow, in conduit or thru treatment plant240
Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia220
Whole effluent toxicity - retest #1800
Whole effluent toxicity - retest #2800
WET, sublethal retest #1800
WET, sublethal retest #2800
Whole Effluent Toxicity - Retest #3800
Whole Effluent Toxicity, Sub-Lethal Retest #3800
Nitrogen, total [as N]600
Phosphorus, total [as P]600
Oxygen, dissolved [DO]100

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
December 31, 2025Permit Violations - Violation Specified in CommentST6
August 19, 2025Failure to minimize or prevent SSO to waters of the U.S. - adverse impacts [40 CFR 122.41(d)]ST6
August 19, 2025Failure to properly operate and maintain the sanitary sewer system [40 CFR 122.41(e)]ST6
April 16, 2025Failure to properly operate and maintain the sanitary sewer system [40 CFR 122.41(e)]ST6
December 31, 2023Permit Violations - Violation Specified in CommentST6
December 20, 2023WW SSO - Improper Operation and MaintenanceST6
March 7, 2023WW SSO - Improper Operation and MaintenanceST6
January 2, 2023WW SSO - Discharge to WatersST6
January 2, 2023WW SSO - Improper Operation and MaintenanceST6
March 1, 2022Permit Violations - Failure to Submit Timely Permit Renewal ApplicationST6
September 7, 2021WW SSO - Improper Operation and MaintenanceST6
September 7, 2021WW SSO - Discharge to WatersST6
February 22, 2021WW SSO - Discharge to WatersST6
February 22, 2021WW SSO - Improper Operation and MaintenanceST6
December 8, 2020Reporting Violations - Failure to submit required report (non-DMR non-pretreatment)ST6
August 21, 2019WW SSO - Improper Operation and MaintenanceST6
July 23, 2019Monitoring Violations - Improper Analysis or Lab ErrorST6
July 23, 2019Management Practice Violations - Improper Operation and MaintenanceST6
July 23, 2019WW Storm Water Non-Construction - Failure to Implement SWPPP/SWMPST6
April 30, 2019Reporting Violations - Improper/ Incorrect ReportingST6
April 25, 2019WW SSO - Discharge to WatersST6
August 29, 2018WW SSO - Discharge to WatersST6
June 4, 2018WW SSO - Improper Operation and MaintenanceST6
February 23, 2018WW SSO - Discharge to WatersST6
October 4, 2017Effluent Violations - Unauthorized DischargeST6
October 4, 2017Management Practice Violations - Improper Operation and MaintenanceST6
July 27, 2017Permit Violations - Violation Specified in CommentST6
July 27, 2017WW Storm Water Non-Construction - Failure to Implement SWPPP/SWMPST6
March 31, 2017Reporting Violations - Improper/ Incorrect ReportingST6

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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Nearby on the register

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

What this page shows

This public-records page covers NPDES permit LA0036323, held by City of Ruston- Northside Wastewater Treatment Plant for the RUSTON, CITY OF- NORTHSIDE WASTEWATER TREATMENT PLANT in Ruston, LA, which discharges to COLVIN CK-CYPRESS CK-BAYOU D'ARBONN. The permit is listed as administratively continued and a Major Discharger, with 28 pollutants under a numeric limit and 12 pollutants with an effluent exceedance. The permit was issued July 20, 2017 and expired July 19, 2022.