Canyon Fuel LLC SUFCO Mine — NPDES permit UT0022918: limits, due date and EPA's record

NPDES permit UT0022918 · Major NON-POTW · effective, expires 2028-01-31 · EPA's file as of 2026-09-19

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

Last period with anything received: 2026-07-31. Most often over: Iron, total [as Fe] (1).

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 (93)

Outfall	Parameter	Statistic	Limit	Months
001	Temperature, water deg. centigrade	DAILY MX	report only	all year
001	Turbidity	DAILY MX	report only	all year
001	Oxygen, dissolved [DO]	DAILY MN	>= 6.5 mg/L	all year
001	Oxygen, dissolved [DO]	MO AVG	report only	all year
001	pH	DAILY MN	>= 6.5 SU	all year
001	pH	DAILY MX	<= 9 SU	all year
001	Solids, total suspended	DAILY MX	<= 70 mg/L	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	Iron, total [as Fe]	DAILY MX	<= 1 mg/L	all year
001	Lead, total [as Pb]	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	Oil and grease	DAILY MX	<= 10 mg/L	all year
001	Floating solids, waste or visible foam-visual	DAILY MX	report only	all year
001	Sanitary waste discharged-assessmnt	DAILY MX	report only	all year
001	Flow, in conduit or thru treatment plant	MO AVG	<= .01 MGD	all year
001	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
001	Solids, total dissolved	30DA AVG	report only	all year
001	Solids, total dissolved	DAILY MX	<= 1422 mg/L	all year
001	Solids, total dissolved	30DA AVG	report only	all year
001	Solids, total dissolved	DAILY MX	report only	all year
001	Mercury, total [as Hg]	DAILY MX	report only	all year
001	Boron, total	DAILY MX	report only	all year
001	Oil and grease visual	DAILY MX	report only	all year
001	Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia	DAILY MX	report only	all year
001	Pass/Fail Static Renewal 7Day Chronic Pimephales promelas	DAILY MX	report only	all year
002	Temperature, water deg. centigrade	DAILY MX	report only	all year
002	Turbidity	DAILY MX	report only	all year
002	Oxygen, dissolved [DO]	DAILY MN	>= 6.5 mg/L	all year
002	Oxygen, dissolved [DO]	MO AVG	report only	all year
002	pH	DAILY MN	>= 6.5 SU	all year
002	pH	DAILY MX	<= 9 SU	all year
002	Solids, total suspended	DAILY MX	<= 70 mg/L	all year
002	Solids, settleable	DAILY MX	<= .5 mg/L	all year
002	Arsenic, total [as As]	DAILY MX	report only	all year
002	Cadmium, total [as Cd]	DAILY MX	report only	all year
002	Chromium, total [as Cr]	DAILY MX	report only	all year
002	Copper, total [as Cu]	DAILY MX	report only	all year
002	Iron, total [as Fe]	DAILY MX	<= 1 mg/L	all year
002	Lead, total [as Pb]	DAILY MX	report only	all year
002	Nickel, total [as Ni]	DAILY MX	report only	all year
002	Silver, total [as Ag]	DAILY MX	report only	all year
002	Zinc, total [as Zn]	DAILY MX	report only	all year
002	Selenium, total [as Se]	DAILY MX	report only	all year
002	Oil and grease	DAILY MX	<= 10 mg/L	all year
002	Floating solids, waste or visible foam-visual	DAILY MX	report only	all year
002	Sanitary waste discharged-assessmnt	DAILY MX	report only	all year
002	Flow, in conduit or thru treatment plant	MO AVG	<= .5 MGD	all year
002	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
002	Solids, total dissolved	30DA AVG	report only	all year
002	Solids, total dissolved	DAILY MX	<= 1204 mg/L	all year
002	Solids, total dissolved	30DA AVG	report only	all year
002	Solids, total dissolved	DAILY MX	report only	all year
002	Mercury, total [as Hg]	DAILY MX	report only	all year
002	Boron, total	DAILY MX	report only	all year
002	Oil and grease visual	DAILY MX	report only	all year
003	Temperature, water deg. centigrade	DAILY MX	report only	all year
003	Turbidity	DAILY MX	report only	all year
003	Oxygen, dissolved [DO]	DAILY MN	>= 6.5 mg/L	all year
003	Oxygen, dissolved [DO]	MO AV MN	report only	all year
003	pH	DAILY MN	>= 6.5 SU	all year
003	pH	DAILY MX	<= 9 SU	all year
003	Solids, total suspended	DAILY MX	<= 70 mg/L	all year
003	Arsenic, total [as As]	DAILY MX	report only	all year
003	Cadmium, total [as Cd]	DAILY MX	report only	all year
003	Chromium, total [as Cr]	DAILY MX	report only	all year
003	Copper, total [as Cu]	DAILY MX	report only	all year
003	Iron, total [as Fe]	DAILY MX	<= 1 mg/L	all year
003	Lead, total [as Pb]	DAILY MX	report only	all year
003	Nickel, total [as Ni]	DAILY MX	report only	all year
003	Silver, total [as Ag]	DAILY MX	report only	all year
003	Zinc, total [as Zn]	DAILY MX	report only	all year
003	Selenium, total [as Se]	DAILY MX	report only	all year
003	Oil and grease	DAILY MX	<= 10 mg/L	all year
003	Floating solids, waste or visible foam-visual	DAILY MX	report only	all year
003	Sanitary waste discharged-assessmnt	DAILY MX	report only	all year
003	Flow, in conduit or thru treatment plant	MX MO AV	<= 8 MGD	all year
003	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
003	Solids, total dissolved	30DA AVG	report only	all year
003	Solids, total dissolved	DAILY MX	<= 1213 mg/L	all year
003	Solids, total dissolved	30DA AVG	report only	all year
003	Solids, total dissolved	DAILY MX	report only	all year
003	Mercury, total [as Hg]	DAILY MX	report only	all year
003	Boron, total	DAILY MX	report only	all year
003	Oil and grease visual	DAILY MX	report only	all year
003	Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia	DAILY MX	report only	all year
003	Pass/Fail Static Renewal 7Day Chronic Pimephales promelas	DAILY MX	report only	all year
SUM	Solids, total dissolved	DAILY MX	report only	all year