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National Grid Generation, LLC

Electric Services, Port Jefferson, New York. NPDES permit NY0005932, in force until Jul 31, 2031. Last 12 months: over a limit once (last October 2025). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 002 form M monthly (5 values), outfall 005 form M monthly (5 values), outfall 007 form M monthly (5 values), outfall 008 form M monthly (5 values), outfall 009 form M monthly (8 values), outfall 025 form X monthly (22 values), and 5 more forms
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 1 of 164 reports late

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

Period endingParameterReportedLimitOver by
October 2025Temp. diff. between intake and discharge, daily maximum30.1 deg F≤ 30 deg F0%

Limits in force (72)

ParameterStatisticLimitMonthsOutfall
Flow ratedaily maximumreport only (gal/d)all year002
pHdaily minimum≥ 6 SUall year002
pHdaily maximum≤ 9 SUall year002
Solids, total suspendeddaily maximum≤ 50 mg/Lall year002
Oil & Greasedaily maximum≤ 15 mg/Lall year002
Flow ratedaily maximumreport only (gal/d)all year005
pHdaily minimum≥ 6 SUall year005
pHdaily maximum≤ 9 SUall year005
Solids, total suspendeddaily maximum≤ 50 mg/Lall year005
Oil & Greasedaily maximum≤ 15 mg/Lall year005
Flow ratedaily maximumreport only (gal/d)all year007
pHdaily minimum≥ 6 SUall year007
pHdaily maximum≤ 9 SUall year007
Solids, total suspendeddaily maximum≤ 50 mg/Lall year007
Oil & Greasedaily maximum≤ 15 mg/Lall year007
Flow ratedaily maximumreport only (gal/d)all year008
pHdaily minimum≥ 6 SUall year008
pHdaily maximum≤ 9 SUall year008
Solids, total suspendeddaily maximum≤ 50 mg/Lall year008
Oil & Greasedaily maximum≤ 15 mg/Lall year008
Temperature, water deg. fahrenheitdaily maximum≤ 110 deg Fall year009
Flow ratemonthly averagereport only (MGD)all year009
Flow ratedaily maximumreport only (MGD)all year009
pHdaily minimum≥ 6 SUall year009
pHdaily maximum≤ 9 SUall year009
Chlorine, total residualdaily maximum≤ .075 mg/Lall year009
Net rate of additionof heatdaily maximum≤ 2800 MBTU/hrall year009
Temp. diff. between intake and dischargedaily maximum≤ 30 deg Fall year009
Flow ratemonthly averagereport only (gal/d)all year025
Flow ratedaily maximumreport only (gal/d)all year025
pHdaily minimum≥ 6 SUall year025
pHdaily maximum≤ 9 SUall year025
Solids, total suspendeddaily average≤ 30 mg/Lall year025
Solids, total suspendeddaily maximum≤ 50 mg/Lall year025
Oil & Greasedaily maximum≤ 15 mg/Lall year025
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year025
Chromium, total [as Cr]daily maximum≤ .2 mg/Lall year025
Copper, total [as Cu]daily maximum≤ .5 mg/Lall year025
Iron, total [as Fe]daily maximum≤ 1 mg/Lall year025
Manganese, total [as Mn]daily maximum≤ 2 mg/Lall year025
Nickel, total [as Ni]daily maximumreport only (mg/L)all year025
Vanadium, total [as V]monthly average≤ 10 mg/Lall year025
Vanadium, total [as V]daily maximum≤ 15 mg/Lall year025
Zinc, total [as Zn]daily maximum≤ 1 mg/Lall year025
Toluenedaily maximum≤ 50 ug/Lall year025
Benzenedaily maximum≤ 50 ug/Lall year025
Ethylbenzenedaily maximum≤ 45 ug/Lall year025
Toxicity [acute], Ceriodaphnia dubiadaily maximum≤ 3 tox acute (alert, not enforceable)all year025
Toxicity [chronic], Ceriodaphnia dubiadaily maximum≤ 10 tox chronic (alert, not enforceable)all year025
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximum≤ 3 tox acute (alert, not enforceable)all year025
Toxicity [chronic], Pimephales promelas [Fathead Minnow]daily maximum≤ 10 tox chronic (alert, not enforceable)all year025
Xylene [mix of m+o+p]daily maximum≤ 50 ug/Lall year025
pH range excursions, > 60 minutesmonthly total≤ 0 occur/moall year025
pH range excursions, monthly total accummonthly total≤ 446 minall year025
Flow ratedaily maximumreport only (gal/d)all year026
pHdaily minimum≥ 6.5 SUall year026
pHdaily maximum≤ 8.5 SUall year026
Oil & Greasedaily maximum≤ 15 mg/Lall year026
Toluenedaily maximum≤ 5 ug/Lall year026
Benzenedaily maximum≤ .8 ug/Lall year026
Ethylbenzenedaily maximum≤ 5 ug/Lall year026
ortho-xylenedaily maximum≤ 5 ug/Lall year026
Xylene, meta & para in combinationdaily maximum≤ 10 ug/Lall year026
Flow ratedaily maximumreport only (gal/d)all year027
pHdaily minimum≥ 6.5 SUall year027
pHdaily maximum≤ 8.5 SUall year027
Oil & Greasedaily maximum≤ 15 mg/Lall year027
Toluenedaily maximum≤ 5 ug/Lall year027
Benzenedaily maximum≤ .8 ug/Lall year027
Ethylbenzenedaily maximum≤ 5 ug/Lall year027
ortho-xylenedaily maximum≤ 5 ug/Lall year027
Xylene, meta & para in combinationdaily maximum≤ 10 ug/Lall year027

How strict are these limits?

Cited limits by parameter: New York's rules and the federal ones.

Same industry: the 39 Electric Services permits in New York.

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Your permit document is the final word. As JSON: /api/v1/permits/NY0005932 · MCP: https://passage-data.com/mcp