Greeley City of — NPDES permit CO0040258: limits, due date and EPA's record

Sewage treatment plant, major discharger, Greeley, Colorado. NPDES permit CO0040258 expired Mar 31, 2017; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Limits in force (187)

Parameter	Statistic	Limit	Months	Outfall
Temperature, water deg. centigrade	maximum weekly average	report only (deg C)	all year	001
Temperature, water deg. centigrade	maximum weekly average	report only (deg C)	all year	001
Temperature, water deg. centigrade	maximum weekly average	report only (deg C)	all year	001
Temperature, water deg. centigrade	daily maximum	report only (deg C)	all year	001
Temperature, water deg. centigrade	daily maximum	report only (deg C)	all year	001
Temperature, water deg. centigrade	daily maximum	report only (deg C)	all year	001
pH	minimum	≥ 6.5 SU	all year	001
pH	minimum	≥ 6.5 SU	all year	001
pH	minimum	≥ 6.5 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
Solids, total suspended	30-day average	≤ 30 mg/L	all year	001
Solids, total suspended	30-day average	≤ 30 mg/L	all year	001
Solids, total suspended	30-day average	≤ 30 mg/L	all year	001
Solids, total suspended	maximum 7-day average	≤ 45 mg/L	all year	001
Solids, total suspended	maximum 7-day average	≤ 45 mg/L	all year	001
Solids, total suspended	maximum 7-day average	≤ 45 mg/L	all year	001
Nitrogen, ammonia total [as N]	30-day average	≤ 10.7 mg/L	Jun	001
Nitrogen, ammonia total [as N]	30-day average	≤ 7.2 mg/L	Aug	001
Nitrogen, ammonia total [as N]	30-day average	≤ 8.3 mg/L	Sep	001
Nitrogen, ammonia total [as N]	30-day average	≤ 13 mg/L	Mar	001
Nitrogen, ammonia total [as N]	30-day average	≤ 9.5 mg/L	Jul	001
Nitrogen, ammonia total [as N]	30-day average	≤ 12 mg/L	Jan	001
Nitrogen, ammonia total [as N]	30-day average	≤ 15 mg/L	Feb	001
Nitrogen, ammonia total [as N]	30-day average	≤ 9.7 mg/L	Oct	001
Nitrogen, ammonia total [as N]	30-day average	≤ 11.8 mg/L	Nov	001
Nitrogen, ammonia total [as N]	30-day average	≤ 11.1 mg/L	May	001
Nitrogen, ammonia total [as N]	30-day average	≤ 11.3 mg/L	Apr	001
Nitrogen, ammonia total [as N]	30-day average	≤ 9.7 mg/L	Jun	001
Nitrogen, ammonia total [as N]	30-day average	≤ 7.4 mg/L	Sep	001
Nitrogen, ammonia total [as N]	30-day average	≤ 6.5 mg/L	Aug	001
Nitrogen, ammonia total [as N]	30-day average	≤ 12 mg/L	Mar	001
Nitrogen, ammonia total [as N]	30-day average	≤ 12 mg/L	Jan	001
Nitrogen, ammonia total [as N]	30-day average	≤ 8.7 mg/L	Jul	001
Nitrogen, ammonia total [as N]	30-day average	≤ 14 mg/L	Feb	001
Nitrogen, ammonia total [as N]	30-day average	≤ 8.8 mg/L	Oct	001
Nitrogen, ammonia total [as N]	30-day average	≤ 10.7 mg/L	Nov	001
Nitrogen, ammonia total [as N]	30-day average	≤ 9.8 mg/L	May	001
Nitrogen, ammonia total [as N]	30-day average	≤ 10.6 mg/L	Apr	001
Nitrogen, ammonia total [as N]	30-day average	≤ 9 mg/L	Jun	001
Nitrogen, ammonia total [as N]	30-day average	≤ 6 mg/L	Aug	001
Nitrogen, ammonia total [as N]	30-day average	≤ 6.8 mg/L	Sep	001
Nitrogen, ammonia total [as N]	30-day average	≤ 8 mg/L	Jul	001
Nitrogen, ammonia total [as N]	30-day average	≤ 12 mg/L	Jan	001
Nitrogen, ammonia total [as N]	30-day average	≤ 11 mg/L	Mar	001
Nitrogen, ammonia total [as N]	30-day average	≤ 8.1 mg/L	Oct	001
Nitrogen, ammonia total [as N]	30-day average	≤ 12 mg/L	Feb	001
Nitrogen, ammonia total [as N]	30-day average	≤ 9.9 mg/L	Nov	001
Nitrogen, ammonia total [as N]	30-day average	≤ 9 mg/L	May	001
Nitrogen, ammonia total [as N]	30-day average	≤ 10 mg/L	Apr	001
Nitrogen, ammonia total [as N]	30-day average	≤ 18.1 mg/L	Dec	001
Nitrogen, ammonia total [as N]	30-day average	≤ 16 mg/L	Dec	001
Nitrogen, ammonia total [as N]	30-day average	≤ 14 mg/L	Dec	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 45 mg/L	Jun	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 49 mg/L	Aug	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 39 mg/L	Sep	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 38 mg/L	Mar	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 50 mg/L	Jul	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 32 mg/L	Jan	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 32 mg/L	Feb	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 44 mg/L	Oct	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 37 mg/L	Nov	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 47 mg/L	May	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 38 mg/L	Apr	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 42.5 mg/L	Jun	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 37 mg/L	Sep	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 45.6 mg/L	Aug	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 33 mg/L	Mar	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 29.5 mg/L	Jan	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 46.5 mg/L	Jul	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 29 mg/L	Feb	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 42 mg/L	Oct	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 35 mg/L	Nov	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 44 mg/L	May	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 37 mg/L	Apr	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 40 mg/L	Jun	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 43 mg/L	Aug	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 36 mg/L	Sep	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 44 mg/L	Jul	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 27 mg/L	Jan	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 30 mg/L	Mar	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 40 mg/L	Oct	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 26 mg/L	Feb	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 34 mg/L	Nov	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 42 mg/L	May	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 36 mg/L	Apr	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 42 mg/L	Dec	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 37.5 mg/L	Dec	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 35 mg/L	Dec	001
Nitrogen, nitrite total [as N]	30-day average	report only (mg/L)	all year	001
Nitrogen, nitrite total [as N]	30-day average	report only (mg/L)	all year	001
Nitrogen, nitrite total [as N]	30-day average	report only (mg/L)	all year	001
Cyanide, weak acid, dissociable	daily maximum	≤ 5.2 ug/L	all year	001
Cyanide, weak acid, dissociable	daily maximum	≤ 5.2 ug/L	all year	001
Cyanide, weak acid, dissociable	daily maximum	≤ 5.2 ug/L	all year	001
Iron, total recoverable	30-day average	report only (ug/L)	all year	001
Iron, total recoverable	30-day average	report only (ug/L)	all year	001
Iron, total recoverable	30-day average	report only (ug/L)	all year	001
Zinc, potentially dissolved	30-day average	≤ 152 ug/L	all year	001
Zinc, potentially dissolved	30-day average	≤ 152 ug/L	all year	001
Zinc, potentially dissolved	30-day average	≤ 152 ug/L	all year	001
Lead, potentially dissolvd	30-day average	≤ 3 ug/L	all year	001
Lead, potentially dissolvd	30-day average	≤ 3 ug/L	all year	001
Lead, potentially dissolvd	30-day average	≤ 3 ug/L	all year	001
Oil and grease	instantaneous maximum	≤ 10 mg/L	all year	001
Oil and grease	instantaneous maximum	≤ 10 mg/L	all year	001
Oil and grease	instantaneous maximum	≤ 10 mg/L	all year	001
E. coli, thermotol, MF, MTEC	30-day geometric mean	≤ 126 #/100mL	all year	001
E. coli, thermotol, MF, MTEC	30-day geometric mean	≤ 126 #/100mL	all year	001
E. coli, thermotol, MF, MTEC	30-day geometric mean	≤ 126 #/100mL	all year	001
E. coli, thermotol, MF, MTEC	maximum 7-day geometric mean	≤ 252 #/100mL	all year	001
E. coli, thermotol, MF, MTEC	maximum 7-day geometric mean	≤ 252 #/100mL	all year	001
E. coli, thermotol, MF, MTEC	maximum 7-day geometric mean	≤ 252 #/100mL	all year	001
Flow, in conduit or thru treatment plant	30-day average	≤ 10 MGD	all year	001
Flow, in conduit or thru treatment plant	30-day average	≤ 12 MGD	all year	001
Flow, in conduit or thru treatment plant	30-day average	≤ 14.7 MGD	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
Chlorine, total residual	30-day average	≤ .014 mg/L	all year	001
Chlorine, total residual	30-day average	≤ .014 mg/L	all year	001
Chlorine, total residual	30-day average	≤ .014 mg/L	all year	001
BOD, carbonaceous [5 day, 20 C]	30-day average	≤ 25 mg/L	all year	001
BOD, carbonaceous [5 day, 20 C]	30-day average	≤ 25 mg/L	all year	001
BOD, carbonaceous [5 day, 20 C]	30-day average	≤ 25 mg/L	all year	001
BOD, carbonaceous [5 day, 20 C]	maximum 7-day average	≤ 40 mg/L	all year	001
BOD, carbonaceous [5 day, 20 C]	maximum 7-day average	≤ 40 mg/L	all year	001
BOD, carbonaceous [5 day, 20 C]	maximum 7-day average	≤ 40 mg/L	all year	001
BOD, carbonaceous, percent removal	monthly average minimum	≥ 85 %	all year	001
BOD, carbonaceous, percent removal	monthly average minimum	≥ 85 %	all year	001
BOD, carbonaceous, percent removal	monthly average minimum	≥ 85 %	all year	001
Solids, suspended percent removal	monthly average minimum	≥ 85 %	all year	001
Solids, suspended percent removal	monthly average minimum	≥ 85 %	all year	001
Solids, suspended percent removal	monthly average minimum	≥ 85 %	all year	001
Oil and grease visual	instantaneous maximum	report only (abst=0;prst=1)	all year	001
Oil and grease visual	instantaneous maximum	report only (abst=0;prst=1)	all year	001
Oil and grease visual	instantaneous maximum	report only (abst=0;prst=1)	all year	001
Chromium, hexavalent dissolved [as Cr]	30-day average	≤ 25 ug/L	all year	01A
Copper, potentially dissolved	30-day average	report only (ug/L)	all year	01A
Selenium, potentially dissolvd	30-day average	report only (ug/L)	all year	01A
Nonylphenol	30-day average	report only (ug/L)	all year	01A
Nonylphenol	daily maximum	report only (ug/L)	all year	01A
Mercury, total [as Hg]	30-day average	≤ .009 ug/L	all year	01A
Static Renewal 7 Day Chronic Ceriodaphnia dubia	single sample	report only (tox chronic)	all year	01A
Static Renewal 7 Day Chronic Ceriodaphnia dubia	minimum value	report only (tox chronic)	all year	01A
Static Renewal 7 Day Chronic Ceriodaphnia dubia	minimum value	≥ 38 tox chronic	all year	01A
Static Renewal 7 Day Chronic Pimephales promelas	single sample	report only (tox chronic)	all year	01A
Static Renewal 7 Day Chronic Pimephales promelas	minimum value	report only (tox chronic)	all year	01A
Static Renewal 7 Day Chronic Pimephales promelas	minimum value	≥ 38 tox chronic	all year	01A
Chromium, hexavalent dissolved [as Cr]	30-day average	≤ 23 ug/L	all year	01B
Copper, potentially dissolved	30-day average	report only (ug/L)	all year	01B
Selenium, potentially dissolvd	30-day average	report only (ug/L)	all year	01B
Nonylphenol	30-day average	report only (ug/L)	all year	01B
Nonylphenol	daily maximum	report only (ug/L)	all year	01B
Mercury, total [as Hg]	30-day average	≤ .009 ug/L	all year	01B
Static Renewal 7 Day Chronic Ceriodaphnia dubia	single sample	report only (tox chronic)	all year	01B
Static Renewal 7 Day Chronic Ceriodaphnia dubia	minimum value	report only (tox chronic)	all year	01B
Static Renewal 7 Day Chronic Ceriodaphnia dubia	minimum value	≥ 43 tox chronic	all year	01B
Static Renewal 7 Day Chronic Pimephales promelas	single sample	report only (tox chronic)	all year	01B
Static Renewal 7 Day Chronic Pimephales promelas	minimum value	report only (tox chronic)	all year	01B
Static Renewal 7 Day Chronic Pimephales promelas	minimum value	≥ 43 tox chronic	all year	01B
Chromium, hexavalent dissolved [as Cr]	30-day average	≤ 21 ug/L	all year	01C
Chromium, hexavalent dissolved [as Cr]	daily maximum	≤ 22 ug/L	all year	01C
Copper, potentially dissolved	30-day average	report only (ug/L)	all year	01C
Selenium, potentially dissolvd	30-day average	report only (ug/L)	all year	01C
Nonylphenol	30-day average	report only (ug/L)	all year	01C
Nonylphenol	daily maximum	report only (ug/L)	all year	01C
Mercury, total [as Hg]	30-day average	≤ .009 ug/L	all year	01C
Static Renewal 7 Day Chronic Ceriodaphnia dubia	single sample	report only (tox chronic)	all year	01C
Static Renewal 7 Day Chronic Ceriodaphnia dubia	minimum value	report only (tox chronic)	all year	01C
Static Renewal 7 Day Chronic Ceriodaphnia dubia	minimum value	≥ 47 tox chronic	all year	01C
Static Renewal 7 Day Chronic Pimephales promelas	single sample	report only (tox chronic)	all year	01C
Static Renewal 7 Day Chronic Pimephales promelas	minimum value	report only (tox chronic)	all year	01C
Static Renewal 7 Day Chronic Pimephales promelas	minimum value	≥ 47 tox chronic	all year	01C
Plant capacity fact. percent of capacity	30-day average	report only (%)	all year	300
Plant capacity fact. percent of capacity	30-day average	report only (%)	all year	300
BOD, 5-day, 20 deg. C	30-day average	report only (mg/L)	all year	300
BOD, 5-day, 20 deg. C	maximum 7-day average	report only (mg/L)	all year	300
BOD, 5-day, 20 deg. C	30-day average	report only (lb/d)	all year	300
BOD, 5-day, 20 deg. C	maximum 7-day average	report only (lb/d)	all year	300
Solids, total suspended	30-day average	report only (mg/L)	all year	300
Solids, total suspended	maximum 7-day average	report only (mg/L)	all year	300
Flow, in conduit or thru treatment plant	30-day average	report only (MGD)	all year	300
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	300
BOD, carbonaceous [5 day, 20 C]	30-day average	report only (mg/L)	all year	300
BOD, carbonaceous [5 day, 20 C]	maximum 7-day average	report only (mg/L)	all year	300

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/CO0040258 · MCP: https://passage-data.com/mcp