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Clean Water Act discharge permit · NPDES CO0049056

LARIMER COUNTY LANDFILL, Fort Collins, CO: NPDES CO0049056 discharge permit, effluent exceedances, inspections, penalties

LARIMER COUNTY LANDFILL, held by Larimer County, holds NPDES permit CO0049056, which discharges to Smith Creek And Fossil Creek. EPA’s file records it issued December 30, 2022 and expiring January 31, 2028. 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 filedLARIMER COUNTY LANDFILL
Permittee as filedLarimer County
NPDES IDCO0049056
Permit statusEffective
Permit typeIndividual permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedDecember 30, 2022
Expiration dateJanuary 31, 2028
AddressFort Collins, CO 80526
Receiving waterSmith Creek and Fossil Creek
Receiving water impaired303(D) Listed
SubwatershedFossil Creek-Reservoir-Cache La Poudre River (HUC 101900071002)

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; the 60 with the most exceedances of 107 are shown.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Chloride [as Cl]87068April 30, 2026558% over the limit
Iron, total recoverable87068April 30, 20265,788% over the limit
Sulfide-hydrogen sulfide [undissociated]87068April 30, 2026333,233% over the limit
Boron, total87068April 30, 2026724,718% over the limit
1,4-Dioxane86664April 30, 2026244,186% over the limit
Vinyl chloride86260February 28, 202642,186% over the limit
Uranium, total85957April 30, 2026786% over the limit
Solids, total suspended45452April 30, 2026236% over the limit
Nitrogen, nitrite total [as N]84947April 30, 2026593% over the limit
Arsenic, total recoverable84442April 30, 2026228,567% over the limit
Manganese, dissolved [as Mn]44342April 30, 20266,840% over the limit
Sulfate44342April 30, 20268,029% over the limit
1,2-Dichloroethane124441February 28, 2026988% over the limit
1,2-Dichloropropane124441February 28, 2026767% over the limit
Manganese, potentially dissolvd104138April 30, 2026566% over the limit
Nitrogen, ammonia total [as N]1023734April 30, 20267,950% over the limit
Selenium, potentially dissolvd123431April 30, 2026342% over the limit
Dichloromethane82927April 30, 2026218% over the limit
Iron, dissolved [as Fe]42726April 30, 20269,079% over the limit
Aluminum, total recoverable122825April 30, 2026388% over the limit
Benzene122623February 28, 2026197% over the limit
Trichloroethylene82422February 28, 202632% over the limit
Nitrogen, inorganic total82220April 30, 2026133% over the limit
Molybdenum, total recoverable82220April 30, 2026293% over the limit
Nickel, potentially dissolvd82219April 30, 202662% over the limit
Nickel, total recoverable62119April 30, 202654% over the limit
Static Renewal 7 Day Chronic Ceriodaphnia dubia61919June 30, 202699,999% over the limit
Static Renewal 7 Day Chronic Pimephales promelas61616June 30, 202664% over the limit
Silver, potentially dissolved121613October 31, 2025202% over the limit
1,1,2-Trichloroethane12118April 30, 202522% over the limit
Copper, potentially dissolved1252April 30, 2026159% over the limit
Lead, potentially dissolvd1252October 31, 20249% over the limit
pH442June 30, 2025
Phenol442December 31, 20232,433% over the limit
Mercury, total [low level]811September 30, 202420% over the limit
Perfluorobutanesulfonic acid (PFBS)840
Perfluorohexanesulfonic acid (PFHxS)840
PFAS Sum840
Perfluorooctanoic acid (PFOA)440
Perfluorobutanoic acid (PFBA)440
Perfluorooctanesulfonamide (PFOSA)440
Perfluoropentanoic acid (PFPeA)440
Perfluorohexanoic acid (PFHxA)440
Perfluoroheptanoic acid (PFHpA)440
Perfluorononanoic acid (PFNA)440
Perfluorodecanoic acid (PFDA)440
Perfluoroundecanoic acid (PFUnA)440
Perfluorododecanoic acid (PFDoA)440
Perfluorotridecanoic acid (PFTrDA)440
Perfluorotetradecanoic acid (PFTeDA)440
N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)440
N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)440
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)440
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)440
Perfluorodecanesulfonic acid (PFDS)440
Perfluoroheptanesulfonic acid (PFHpS)440
Perfluorooctanesulfonic acid (PFOS)440
1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)440
1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)440
1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)440

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
April 1, 2025Monitoring Violations - Failure to Monitor for Toxicity RequirementsST6
January 1, 2025Monitoring Violations - Failure to Monitor for Toxicity RequirementsST6
October 1, 2024Monitoring Violations - Failure to Monitor for Toxicity RequirementsST6
July 1, 2024Monitoring Violations - Failure to Monitor for Toxicity RequirementsST6
April 1, 2024Monitoring Violations - Failure to Monitor for Toxicity RequirementsST6
January 1, 2024Monitoring Violations - Failure to Monitor for Toxicity RequirementsST6
October 1, 2023Monitoring Violations - Failure to Monitor for Toxicity RequirementsST6

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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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 CO0049056 there.

Nearby on the register

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