DEVON POWER LLC c/o EASTERN GENERATION LLC — NPDES permit CT0003107: limits, due date and EPA's record

NPDES permit CT0003107 · Major NON-POTW · administratively continued, expires 2017-02-28 · EPA's file as of 2026-09-19

This permit expired on 2017-02-28 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 30 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (40)

Outfall	Parameter	Statistic	Limit	Months
002	Flow rate	MO AVG	<= 216000 gal/d	all year
002	Oxygen, dissolved [DO]	INST MAX	report only	all year
002	pH	INST MIN	>= 6 SU	all year
002	pH	INST MAX	<= 9 SU	all year
002	Solids, total suspended	MO AVG	report only	all year
002	Solids, total suspended	DAILY MX	report only	all year
002	Oil & Grease	MO AVG	report only	all year
002	Oil & Grease	DAILY MX	report only	all year
002	Nitrogen, total [as N]	DAILY MX	report only	all year
002	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
002	Nitrogen, nitrite total [as N]	DAILY MX	report only	all year
002	Nitrogen, nitrate total [as N]	DAILY MX	report only	all year
002	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
002	Copper, total [as Cu]	MO AVG	report only	all year
002	Copper, total [as Cu]	DAILY MX	<= 25 ug/L	all year
002	Iron, total [as Fe]	MO AVG	report only	all year
002	Iron, total [as Fe]	DAILY MX	report only	all year
002	Lead, total [as Pb]	MO AVG	report only	all year
002	Lead, total [as Pb]	DAILY MX	report only	all year
002	Nickel, total [as Ni]	MO AVG	<= 73 ug/L	all year
002	Nickel, total [as Ni]	DAILY MX	<= 157 ug/L	all year
002	Nickel, total [as Ni]	MO AVG	<= 60 g/d	all year
002	Nickel, total [as Ni]	DAILY MX	<= 128 g/d	all year
002	Zinc, total [as Zn]	MO AVG	report only	all year
002	Zinc, total [as Zn]	DAILY MX	report only	all year
002	Aluminum, total [as Al]	MO AVG	report only	all year
002	Aluminum, total [as Al]	DAILY MX	report only	all year
002	Flow, maximum during 24 hr period	DAILY MX	<= 432000 gal/d	all year
002	Chlorine, total residual	MO AVG	<= .201 mg/L	all year
002	Chlorine, total residual	DAILY MX	<= .541 mg/L	all year
002	Propylene glycol, total	MO AVG	report only	all year
002	Propylene glycol, total	DAILY MX	report only	all year
002	pH, maximum	INST MAX	<= 9 SU	all year
002	pH, minimum	INST MIN	>= 6 SU	all year
002	Flow	DAILY MX	<= 432000 gal/d	all year
002	Duration of discharge	DAILY MX	report only	all year
002	LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)	MINIMUM	>= 100 %	Feb, Aug
002	LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)	MINIMUM	report only	Jan, Mar, Apr, May, Jun, Jul, Sep, Oct, Nov, Dec
002	LC50 Static 48Hr Acute Cyprinodon variegatus	MINIMUM	>= 100 %	Feb, Aug
002	LC50 Static 48Hr Acute Cyprinodon variegatus	MINIMUM	report only	Jan, Mar, Apr, May, Jun, Jul, Sep, Oct, Nov, Dec