Snowmass Water and Saniation Dist — NPDES permit CO0023086: limits, due date and EPA's record

NPDES permit CO0023086 · Major POTW · administratively continued, expires 2020-04-30 · EPA's file as of 2026-09-19

This permit expired on 2020-04-30 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (111)

Outfall	Parameter	Statistic	Limit	Months
001	Cyanide, total [as CN]	DAILY MX	report only	all year
001	Arsenic, total [as As]	DAILY MX	report only	all year
001	Cadmium, total [as Cd]	DAILY MX	report only	all year
001	Chromium, total [as Cr]	DAILY MX	report only	all year
001	Copper, total [as Cu]	DAILY MX	report only	all year
001	Lead, total [as Pb]	DAILY MX	report only	all year
001	Molybdenum, total [as Mo]	DAILY MX	report only	all year
001	Nickel, total [as Ni]	DAILY MX	report only	all year
001	Silver, total [as Ag]	DAILY MX	report only	all year
001	Zinc, total [as Zn]	DAILY MX	report only	all year
001	Selenium, total [as Se]	DAILY MX	report only	all year
001	Total phenols	DAILY MX	report only	all year
001	Mercury, total [as Hg]	DAILY MX	report only	all year
003	Temperature, water deg. centigrade	MX WK AV	report only	all year
003	Temperature, water deg. centigrade	DAILY MX	report only	all year
003	BOD, 5-day, 20 deg. C	30DA AVG	<= 30 mg/L	all year
003	BOD, 5-day, 20 deg. C	MX 7D AV	<= 45 mg/L	all year
003	pH	MINIMUM	>= 6.5 SU	all year
003	pH	MAXIMUM	<= 9 SU	all year
003	Solids, total suspended	30DA AVG	<= 30 mg/L	all year
003	Solids, total suspended	MX 7D AV	<= 45 mg/L	all year
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 3.9 mg/L	Jun
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 2.1 mg/L	Aug
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 1.5 mg/L	Sep
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 2.6 mg/L	Jul
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 3.8 mg/L	Jan
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 3.7 mg/L	Mar
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 1.2 mg/L	Oct
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 3.3 mg/L	Feb
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 2.1 mg/L	Nov
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 1.9 mg/L	May
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 3.5 mg/L	Dec
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 2.2 mg/L	Apr
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 12 mg/L	Jun
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 18 mg/L	Aug
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 19 mg/L	Sep
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 19 mg/L	Jul
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 10 mg/L	Jan
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 11 mg/L	Mar
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 15 mg/L	Oct
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 12 mg/L	Feb
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 10 mg/L	Nov
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 5.7 mg/L	May
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 8.7 mg/L	Dec
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 8.1 mg/L	Apr
003	Nitrogen, inorganic total	DAILY MX	report only	all year
003	Nitrogen, inorganic total	Agg Rol Av	report only	all year
003	Nitrogen, inorganic total	95th %	report only	all year
003	Phosphorus, total [as P]	Agg Rol Av	report only	all year
003	Phosphorus, total [as P]	95th %	report only	all year
003	Cyanide, weak acid, dissociable	DAILY MX	report only	all year
003	Chloride [as Cl]	30DA AVG	report only	all year
003	Arsenic, total recoverable	30DA AVG	report only	all year
003	Iron, total recoverable	30DA AVG	report only	all year
003	Iron, dissolved [as Fe]	30DA AVG	report only	all year
003	Molybdenum, total recoverable	30DA AVG	report only	all year
003	Chromium, hexavalent dissolved [as Cr]	30DA AVG	report only	all year
003	Chromium, hexavalent dissolved [as Cr]	DAILY MX	report only	all year
003	Zinc, potentially dissolved	30DA AVG	report only	all year
003	Zinc, potentially dissolved	DN	report only	all year
003	Copper, potentially dissolved	30DA AVG	<= 33 ug/L	all year
003	Copper, potentially dissolved	30DA AVG	<= 17 ug/L	all year
003	Copper, potentially dissolved	DAILY MX	report only	all year
003	Copper, potentially dissolved	DAILY MX	<= 26 ug/L	all year
003	Cadmium, potentially dissolvd	30DA AVG	report only	all year
003	Cadmium, potentially dissolvd	DAILY MX	report only	all year
003	Chromium, trivalent, potentially dissolvd	30DA AVG	report only	all year
003	Chromium, trivalent, potentially dissolvd	DAILY MX	report only	all year
003	Lead, potentially dissolvd	30DA AVG	report only	all year
003	Lead, potentially dissolvd	DAILY MX	report only	all year
003	Manganese, potentially dissolvd	30DA AVG	report only	all year
003	Manganese, potentially dissolvd	DAILY MX	report only	all year
003	Nickel, potentially dissolvd	30DA AVG	report only	all year
003	Nickel, potentially dissolvd	DAILY MX	report only	all year
003	Selenium, potentially dissolvd	30DA AVG	report only	all year
003	Selenium, potentially dissolvd	DAILY MX	report only	all year
003	Oil and grease	INST MAX	<= 10 mg/L	all year
003	Chromium, trivalent total recoverable	DAILY MX	report only	all year
003	Flow, in conduit or thru treatment plant	30DA AVG	<= 3.2 MGD	all year
003	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
003	Chlorine, total residual	30DA AVG	<= .013 mg/L	all year
003	Chlorine, total residual	INST MAX	<= .022 mg/L	all year
003	E. coli	30DA GM	<= 147 #/100mL	all year
003	E. coli	MX 7D GM	<= 294 #/100mL	all year
003	Nonylphenol	30DA AVG	report only	all year
003	Nonylphenol	DAILY MX	report only	all year
003	Solids, total dissolved	30DA AVG	report only	all year
003	Solids, total dissolved	30DA AVG	report only	all year
003	Mercury, total [as Hg]	30DA AVG	<= .012 ug/L	all year
003	BOD, 5-day, percent removal	MO AV MN	>= 85 %	all year
003	Solids, suspended percent removal	MO AV MN	>= 85 %	all year
003	Sulfate	30DA AVG	report only	all year
003	Oil and grease visual	INST MAX	report only	all year
003	Static Renewal 7 Day Chronic Ceriodaphnia dubia	SINGSAMP	report only	all year
003	Static Renewal 7 Day Chronic Ceriodaphnia dubia	MN VALUE	report only	all year
003	Static Renewal 7 Day Chronic Ceriodaphnia dubia	MN VALUE	>= 85 tox chronic	all year
003	Static Renewal 7 Day Chronic Pimephales promelas	SINGSAMP	report only	all year
003	Static Renewal 7 Day Chronic Pimephales promelas	MN VALUE	report only	all year
003	Static Renewal 7 Day Chronic Pimephales promelas	MN VALUE	>= 85 tox chronic	all year
300	Plant capacity fact. percent of capacity	30DA AVG	report only	all year
300	Plant capacity fact. percent of capacity	30DA AVG	report only	all year
300	BOD, 5-day, 20 deg. C	30DA AVG	report only	all year
300	BOD, 5-day, 20 deg. C	MX 7D AV	report only	all year
300	BOD, 5-day, 20 deg. C	30DA AVG	report only	all year
300	BOD, 5-day, 20 deg. C	MX 7D AV	report only	all year
300	Solids, total suspended	30DA AVG	report only	all year
300	Solids, total suspended	MX 7D AV	report only	all year
300	Flow, in conduit or thru treatment plant	30DA AVG	report only	all year
300	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
UST1	Temperature, water deg. centigrade	MX WK AV	report only	all year
UST1	Temperature, water deg. centigrade	DAILY MX	report only	all year