Delaware City Refining Co.

NPDES permit DE0000256 · Major NON-POTW · expired, expires 2023-07-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

This permit expired on 2023-07-31 and is expired: 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

2values over a limit
0required values missing, on 0 form(s)
12of 120 forms filed late

Last period with anything received: 2026-06-30. Most often over: Iron, total [as Fe] (1), Carbon, tot organic [TOC] (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 (169)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitDAILY AV report only all year
001Temperature, water deg. fahrenheitDAILY MX <= 110 deg F all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Oil & GreaseDAILY AV <= 7 mg/L all year
001Oil & GreaseINST MAX <= 10 mg/L all year
001Flow, in conduit or thru treatment plantDAILY AV <= 452 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Flow, in conduit or thru treatment plantROLL AVG <= 303 MGD all year
001Chlorine, total residualDAILY MX <= .2 mg/L all year
011pHDAILY MN >= 6 SU all year
011pHDAILY MX <= 9 SU all year
011Solids, total suspendedDAILY AV <= 22 mg/L all year
011Solids, total suspendedDAILY MX <= 40 mg/L all year
011Solids, total suspendedDAILY AV <= 112 lb/d all year
011Solids, total suspendedDAILY MX <= 203 lb/d all year
011Oil & GreaseDAILY AV <= 10 mg/L all year
011Oil & GreaseDAILY MX <= 20 mg/L all year
011Oil & GreaseDAILY AV <= 50 lb/d all year
011Oil & GreaseDAILY MX <= 101 lb/d all year
011Iron, total [as Fe]DAILY AV <= 2 mg/L all year
011Iron, total [as Fe]DAILY MX <= 3 mg/L all year
011Iron, total [as Fe]DAILY AV <= 11.3 lb/d all year
011Iron, total [as Fe]DAILY MX <= 17 lb/d all year
011Flow, in conduit or thru treatment plantDAILY AV <= .675 MGD all year
011Flow, in conduit or thru treatment plantDAILY MX report only all year
016pHDAILY MN >= 6 SU all year
016pHDAILY MX <= 9 SU all year
016Solids, total suspendedDAILY AV <= 30 mg/L all year
016Solids, total suspendedDAILY MX <= 100 mg/L all year
016Solids, total suspendedDAILY AV report only all year
016Solids, total suspendedDAILY MX report only all year
016Oil & GreaseDAILY AV <= 10 mg/L all year
016Oil & GreaseDAILY MX <= 13 mg/L all year
016Oil & GreaseDAILY AV report only all year
016Oil & GreaseDAILY MX report only all year
016Flow, in conduit or thru treatment plantDAILY AV report only all year
016Flow, in conduit or thru treatment plantDAILY MX report only all year
017pHDAILY MN >= 6 SU all year
017pHDAILY MX <= 9 SU all year
017Solids, total suspendedDAILY AV <= 30 mg/L all year
017Solids, total suspendedDAILY MX <= 100 mg/L all year
017Solids, total suspendedDAILY AV report only all year
017Solids, total suspendedDAILY MX report only all year
017Oil & GreaseDAILY AV <= 10 mg/L all year
017Oil & GreaseDAILY MX <= 13 mg/L all year
017Oil & GreaseDAILY AV report only all year
017Oil & GreaseDAILY MX report only all year
017Flow, in conduit or thru treatment plantDAILY AV report only all year
017Flow, in conduit or thru treatment plantDAILY MX report only all year
035pHDAILY MN >= 6 SU all year
035pHDAILY MX <= 9 SU all year
035Solids, total suspendedDAILY AV <= 30 mg/L all year
035Solids, total suspendedDAILY MX <= 100 mg/L all year
035Solids, total suspendedDAILY AV report only all year
035Solids, total suspendedDAILY MX report only all year
035Oil & GreaseDAILY AV <= 10 mg/L all year
035Oil & GreaseDAILY MX <= 20 mg/L all year
035Oil & GreaseDAILY AV report only all year
035Oil & GreaseDAILY MX report only all year
035Flow, in conduit or thru treatment plantDAILY AV report only all year
035Flow, in conduit or thru treatment plantDAILY MX report only all year
101Solids, total suspendedDAILY AV <= 29 mg/L all year
101Solids, total suspendedDAILY MX <= 65 mg/L all year
101Oil & GreaseDAILY AV <= 10 mg/L all year
101Oil & GreaseDAILY MX <= 15 mg/L all year
101Flow, in conduit or thru treatment plantDAILY AV report only all year
101Flow, in conduit or thru treatment plantDAILY MX report only all year
201Carbon, tot organic [TOC]DAILY MX <= 5 mg/L all year
201Flow, in conduit or thru treatment plantDAILY AV <= 398 MGD all year
201Flow, in conduit or thru treatment plantDAILY MX report only all year
301Oil & GreaseDAILY AV <= 10 mg/L all year
301Oil & GreaseDAILY MX <= 15 mg/L all year
401Thermal DischargeDAILY AV <= 703 BTU/hr all year
401Thermal DischargeDAILY MX <= 995 BTU/hr all year
401BOD, 5-day, 20 deg. CDAILY AV report only all year
401BOD, 5-day, 20 deg. CDAILY MX report only all year
401BOD, 5-day, 20 deg. CDAILY AV report only all year
401BOD, 5-day, 20 deg. CDAILY MX report only all year
401Carbon, tot organic [TOC]DAILY AV report only all year
401Carbon, tot organic [TOC]DAILY MX <= 23 mg/L all year
401Carbon, tot organic [TOC]DAILY AV report only all year
401Carbon, tot organic [TOC]DAILY MX report only all year
401Iron, total [as Fe]DAILY AV report only all year
401Iron, total [as Fe]DAILY MX report only all year
401Iron, total [as Fe]DAILY AV report only all year
401Iron, total [as Fe]DAILY MX report only all year
401Aluminum, total [as Al]DAILY AV report only all year
401Aluminum, total [as Al]DAILY MX report only all year
401Aluminum, total [as Al]DAILY AV report only all year
401Aluminum, total [as Al]DAILY MX report only all year
401Flow, in conduit or thru treatment plantDAILY AV report only all year
401Flow, in conduit or thru treatment plantDAILY MX report only all year
501Flow, in conduit or thru treatment plantDAILY AV <= 9 MGD all year
501Flow, in conduit or thru treatment plantDAILY MX report only all year
601BOD, 5-day, 20 deg. CDAILY AV <= 25 mg/L all year
601BOD, 5-day, 20 deg. CDAILY MX <= 44 mg/L all year
601BOD, 5-day, 20 deg. CDAILY AV <= 1867 lb/d all year
601BOD, 5-day, 20 deg. CDAILY MX <= 3326 lb/d all year
601Solids, total suspendedDAILY AV <= 29 mg/L all year
601Solids, total suspendedDAILY MX <= 43 mg/L all year
601Solids, total suspendedDAILY AV <= 2198 lb/d all year
601Solids, total suspendedDAILY MX <= 3218 lb/d all year
601Oil & GreaseDAILY AV <= 7 mg/L all year
601Oil & GreaseDAILY MX <= 13 mg/L all year
601Oil & GreaseDAILY AV <= 528 lb/d all year
601Oil & GreaseDAILY MX <= 994 lb/d all year
601Nitrogen, total [as N]DAILY AV report only all year
601Nitrogen, total [as N]DAILY MX report only all year
601Nitrogen, total [as N]DAILY AV report only all year
601Nitrogen, total [as N]DAILY MX report only all year
601Nitrogen, ammonia total [as N]DAILY AV <= 12 mg/L all year
601Nitrogen, ammonia total [as N]DAILY MX <= 25 mg/L all year
601Nitrogen, ammonia total [as N]DAILY AV <= 864 lb/d all year
601Nitrogen, ammonia total [as N]DAILY MX <= 1901 lb/d all year
601Nitrogen, nitrite total [as N]DAILY AV report only all year
601Nitrogen, nitrite total [as N]DAILY MX report only all year
601Nitrogen, nitrite total [as N]DAILY AV report only all year
601Nitrogen, nitrite total [as N]DAILY MX report only all year
601Nitrogen, nitrate total [as N]DAILY AV report only all year
601Nitrogen, nitrate total [as N]DAILY MX report only all year
601Nitrogen, nitrate total [as N]DAILY AV report only all year
601Nitrogen, nitrate total [as N]DAILY MX report only all year
601Nitrogen, Kjeldahl, total [as N]DAILY AV report only all year
601Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
601Nitrogen, Kjeldahl, total [as N]DAILY AV report only all year
601Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
601Carbon, tot organic [TOC]DAILY AV <= 42 mg/L all year
601Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
601Carbon, tot organic [TOC]DAILY AV <= 3174 lb/d all year
601Carbon, tot organic [TOC]DAILY MX <= 5655 lb/d all year
601Cyanide, free-water plus wastewatersDAILY AV report only all year
601Cyanide, free-water plus wastewatersDAILY MX report only all year
601Cyanide, free-water plus wastewatersDAILY AV report only all year
601Cyanide, free-water plus wastewatersDAILY MX report only all year
601Sulfide, total [as S]DAILY AV <= .11 mg/L all year
601Sulfide, total [as S]DAILY MX <= .25 mg/L all year
601Sulfide, total [as S]DAILY AV <= 8.4 lb/d all year
601Sulfide, total [as S]DAILY MX <= 18.7 lb/d all year
601Chromium, hexavalent [as Cr]DAILY AV <= .015 mg/L all year
601Chromium, hexavalent [as Cr]DAILY MX <= .03 mg/L all year
601Chromium, hexavalent [as Cr]DAILY AV <= 1.13 lb/d all year
601Chromium, hexavalent [as Cr]DAILY MX <= 2.5 lb/d all year
601Chromium, total [as Cr]DAILY AV <= .17 mg/L all year
601Chromium, total [as Cr]DAILY MX <= .49 mg/L all year
601Chromium, total [as Cr]DAILY AV <= 12.9 lb/d all year
601Chromium, total [as Cr]DAILY MX <= 37 lb/d all year
601Iron, total [as Fe]DAILY AV <= 2 mg/L all year
601Iron, total [as Fe]DAILY MX <= 3 mg/L all year
601Iron, total [as Fe]DAILY AV <= 218 lb/d all year
601Iron, total [as Fe]DAILY MX <= 328 lb/d all year
601Vanadium, total [as V]DAILY AV report only all year
601Vanadium, total [as V]DAILY MX report only all year
601Vanadium, total [as V]DAILY AV report only all year
601Vanadium, total [as V]DAILY MX report only all year
601Selenium, total [as Se]DAILY AV <= .02 mg/L all year
601Selenium, total [as Se]DAILY MX <= .03 mg/L all year
601Selenium, total [as Se]DAILY AV <= 2.2 lb/d all year
601Selenium, total [as Se]DAILY MX <= 3.3 lb/d all year
601Flow, in conduit or thru treatment plantDAILY AV <= 13 MGD all year
601Flow, in conduit or thru treatment plantDAILY MX report only all year
601Phenolic compounds, totalDAILY AV <= .15 mg/L all year
601Phenolic compounds, totalDAILY MX <= .32 mg/L all year
601Phenolic compounds, totalDAILY AV <= 10.9 lb/d all year
601Phenolic compounds, totalDAILY MX <= 24 lb/d all year
701Temperature, water deg. fahrenheitDAILY AV report only all year
701Temperature, water deg. fahrenheitDAILY MX report only all year
701Flow, in conduit or thru treatment plantDAILY AV report only all year
701Flow, in conduit or thru treatment plantDAILY MX report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states