Erie Town of — NPDES permit CO0048445: limits, due date and EPA's record

Sewage treatment plant, major discharger, Weld County, Colorado. NPDES permit CO0048445 expired Jan 31, 2016; its limits still apply. Last 12 months: over a limit 15 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Limits in force (123)

Period ending	Parameter	Reported	Limit	Over by
October 2025	E. coli, thermotol, MF, MTEC, 30-day average	> 9.9 #/100mL	≤ 126 #/100mL	—
October 2025	E. coli, thermotol, MF, MTEC, maximum 7-day average	> 11.6 #/100mL	≤ 252 #/100mL	—
October 2025	Manganese, dissolved [as Mn], rolling average	26.1 ug/L	≤ 18 ug/L	45%
November 2025	Manganese, dissolved [as Mn], rolling average	26.98 ug/L	≤ 18 ug/L	50%
December 2025	Manganese, dissolved [as Mn], rolling average	26.7 ug/L	≤ 18 ug/L	48%
January 2026	Manganese, dissolved [as Mn], rolling average	26.3 ug/L	≤ 18 ug/L	46%
February 2026	Manganese, dissolved [as Mn], rolling average	25.9 ug/L	≤ 18 ug/L	44%
March 2026	Manganese, dissolved [as Mn], rolling average	25.5 ug/L	≤ 18 ug/L	42%
April 2026	Manganese, dissolved [as Mn], rolling average	25.6 ug/L	≤ 18 ug/L	42%
May 2026	Manganese, dissolved [as Mn], rolling average	26.1 ug/L	≤ 18 ug/L	45%
June 2026	Flow, in conduit or thru treatment plant, 30-day average	3.169 MGD	≤ 3.03 MGD	5%
June 2026	Manganese, dissolved [as Mn], rolling average	27.3 ug/L	≤ 18 ug/L	52%
July 2026	Manganese, dissolved [as Mn], rolling average	27.7 ug/L	≤ 18 ug/L	54%
August 2026	Manganese, dissolved [as Mn], rolling average	27.6 ug/L	≤ 18 ug/L	53%
September 2026	Manganese, dissolved [as Mn], rolling average	27.5 ug/L	≤ 18 ug/L	53%

Parameter	Statistic	Limit	Months	Outfall
Temperature, water deg. centigrade	maximum 7-day average	report only (deg C)	all year	001
Temperature, water deg. centigrade	daily maximum	report only (deg C)	all year	001
BOD, 5-day, 20 deg. C	30-day average	≤ 30 mg/L	all year	001
BOD, 5-day, 20 deg. C	maximum 7-day average	≤ 45 mg/L	all year	001
pH	minimum	≥ 6.5 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	maximum 7-day average	≤ 45 mg/L	all year	001
Nitrogen, ammonia total [as N]	30-day average	≤ 3.2 mg/L	Oct	001
Nitrogen, ammonia total [as N]	30-day average	≤ 4.8 mg/L	Nov	001
Nitrogen, ammonia total [as N]	30-day average	≤ 5 mg/L	Dec	001
Nitrogen, ammonia total [as N]	30-day average	≤ 4.8 mg/L	Jan	001
Nitrogen, ammonia total [as N]	30-day average	≤ 2.8 mg/L	Feb	001
Nitrogen, ammonia total [as N]	30-day average	≤ 3.1 mg/L	Mar	001
Nitrogen, ammonia total [as N]	30-day average	≤ 2.7 mg/L	Apr	001
Nitrogen, ammonia total [as N]	30-day average	≤ 2.3 mg/L	May	001
Nitrogen, ammonia total [as N]	30-day average	≤ 2.4 mg/L	Jun	001
Nitrogen, ammonia total [as N]	30-day average	≤ 2 mg/L	Jul	001
Nitrogen, ammonia total [as N]	30-day average	≤ 1.9 mg/L	Aug	001
Nitrogen, ammonia total [as N]	30-day average	≤ 2.1 mg/L	Sep	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 4.4 mg/L	Oct	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 9 mg/L	Nov	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 7.8 mg/L	Dec	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 4.8 mg/L	Jan	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 2.8 mg/L	Feb	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 3.3 mg/L	Mar	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 2.9 mg/L	Apr	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 2.3 mg/L	May	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 3.8 mg/L	Jun	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 2 mg/L	Jul	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 1.9 mg/L	Aug	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 2.1 mg/L	Sep	001
Cyanide, weak acid, dissociable	daily maximum	≤ 19 ug/L	all year	001
Cyanide, weak acid, dissociable	rolling average	report only (ug/L)	all year	001
Cyanide, weak acid, dissociable	rolling average	≤ 2.8 ug/L	all year	001
Iron, total recoverable	30-day average	≤ 3713 ug/L	all year	001
Iron, total recoverable	rolling average	≤ 1151 ug/L	all year	001
Arsenic, total [as As]	30-day average	report only (ug/L)	all year	001
Arsenic, total [as As]	30-day average	≤ .12 ug/L	all year	001
Arsenic, total [as As]	30-day average	report only (ug/L)	all year	001
Arsenic, total [as As]	daily maximum	report only (ug/L)	all year	001
Arsenic, total [as As]	daily maximum	report only (ug/L)	all year	001
Iron, dissolved [as Fe]	30-day average	report only (ug/L)	all year	001
Iron, dissolved [as Fe]	30-day average	≤ 1302 ug/L	all year	001
Iron, dissolved [as Fe]	rolling average	report only (ug/L)	all year	001
Iron, dissolved [as Fe]	rolling average	≤ 102 ug/L	all year	001
Manganese, dissolved [as Mn]	30-day average	report only (ug/L)	all year	001
Manganese, dissolved [as Mn]	30-day average	≤ 55 ug/L	all year	001
Manganese, dissolved [as Mn]	rolling average	report only (ug/L)	all year	001
Manganese, dissolved [as Mn]	rolling average	≤ 18 ug/L	all year	001
Chromium, total recoverable	daily maximum	report only (ug/L)	all year	001
Chromium, total recoverable	daily maximum	≤ 189 ug/L	all year	001
Chromium, total recoverable	rolling average	report only (ug/L)	all year	001
Chromium, total recoverable	rolling average	≤ 28 ug/L	all year	001
Chromium, hexavalent dissolved [as Cr]	30-day average	≤ 68 ug/L	all year	001
Chromium, hexavalent dissolved [as Cr]	daily maximum	≤ 61 ug/L	all year	001
Chromium, hexavalent dissolved [as Cr]	rolling average	≤ 11 ug/L	all year	001
Zinc, potentially dissolved	daily maximum	≤ 915 ug/L	all year	001
Zinc, potentially dissolved	rolling average	report only (ug/L)	all year	001
Zinc, potentially dissolved	rolling average	≤ 192 ug/L	all year	001
Silver, potentially dissolved	30-day average	≤ 6.1 ug/L	all year	001
Silver, potentially dissolved	daily maximum	≤ 26 ug/L	all year	001
Silver, potentially dissolved	rolling average	report only (ug/L)	all year	001
Silver, potentially dissolved	rolling average	≤ .51 ug/L	all year	001
Copper, potentially dissolved	30-day average	≤ 75 ug/L	all year	001
Copper, potentially dissolved	daily maximum	≤ 82 ug/L	all year	001
Copper, potentially dissolved	rolling average	report only (ug/L)	all year	001
Copper, potentially dissolved	rolling average	≤ 4.9 ug/L	all year	001
Arsenic, potentially dissolved	daily maximum	≤ 1276 ug/L	all year	001
Cadmium, potentially dissolvd	30-day average	≤ 1.9 ug/L	all year	001
Cadmium, potentially dissolvd	daily maximum	≤ 18 ug/L	all year	001
Cadmium, potentially dissolvd	rolling average	report only (ug/L)	all year	001
Cadmium, potentially dissolvd	rolling average	≤ .11 ug/L	all year	001
Chromium, trivalent, potentially dissolvd	daily maximum	≤ 1215 ug/L	all year	001
Lead, potentially dissolvd	30-day average	≤ 27 ug/L	all year	001
Lead, potentially dissolvd	daily maximum	≤ 526 ug/L	all year	001
Lead, potentially dissolvd	rolling average	report only (ug/L)	all year	001
Lead, potentially dissolvd	rolling average	≤ .81 ug/L	all year	001
Manganese, potentially dissolvd	30-day average	≤ 2302 ug/L	all year	001
Manganese, potentially dissolvd	daily maximum	≤ 14207 ug/L	all year	001
Nickel, potentially dissolvd	30-day average	≤ 591 ug/L	all year	001
Nickel, potentially dissolvd	daily maximum	≤ 3249 ug/L	all year	001
Nickel, potentially dissolvd	rolling average	report only (ug/L)	all year	001
Nickel, potentially dissolvd	rolling average	≤ 87 ug/L	all year	001
Selenium, potentially dissolvd	30-day average	≤ 4.6 ug/L	all year	001
Selenium, potentially dissolvd	daily maximum	≤ 56 ug/L	all year	001
Selenium, potentially dissolvd	rolling average	report only (ug/L)	all year	001
Selenium, potentially dissolvd	rolling average	≤ 2.4 ug/L	all year	001
Oil and grease	instantaneous maximum	≤ 10 mg/L	all year	001
Uranium, total	daily maximum	report only (ug/L)	all year	001
Uranium, total	daily maximum	≤ 113 ug/L	all year	001
Uranium, total	rolling average	report only (ug/L)	all year	001
Uranium, total	rolling average	≤ 33 ug/L	all year	001
E. coli, thermotol, MF, MTEC	30-day average	≤ 126 #/100mL	all year	001
E. coli, thermotol, MF, MTEC	maximum 7-day average	≤ 252 #/100mL	all year	001
Flow, in conduit or thru treatment plant	30-day average	≤ 1.5 MGD	all year	001
Flow, in conduit or thru treatment plant	30-day average	≤ 3.03 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	≤ .068 mg/L	all year	001
Chlorine, total residual	instantaneous maximum	≤ .072 mg/L	all year	001
Mercury, total [as Hg]	30-day average	≤ .062 ug/L	all year	001
Mercury, total [as Hg]	rolling average	report only (ug/L)	all year	001
Mercury, total [as Hg]	rolling average	≤ .0093 ug/L	all year	001
BOD, 5-day, 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 (N=0;Y=1)	all year	001
Static Renewal 7 Day Chronic Ceriodaphnia dubia	single sample	report only (tox chronic)	all year	001
Static Renewal 7 Day Chronic Ceriodaphnia dubia	single sample	report only (tox chronic)	all year	001
Static Renewal 7 Day Chronic Ceriodaphnia dubia	minimum value	≥ 16 tox chronic	all year	001
Static Renewal 7 Day Chronic Pimephales promelas	single sample	report only (tox chronic)	all year	001
Static Renewal 7 Day Chronic Pimephales promelas	single sample	report only (tox chronic)	all year	001
Static Renewal 7 Day Chronic Pimephales promelas	minimum value	≥ 16 tox chronic	all year	001
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

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/CO0048445 · MCP: https://passage-data.com/mcp