The Premcor Refining Group Inc — NPDES permit IL0001244: limits, due date and EPA's record

Petroleum Bulk Stations & Terminals, Hartford, Illinois. NPDES permit IL0001244, in force until Mar 31, 2030. Last 12 months: over a limit once (last February 2026). Source: EPA ECHO, Oct 22, 2026.

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

Period ending	Parameter	Reported	Limit	Over by
February 2026	BOD, 5-day, 20 deg. C, 30-day average	27.67 mg/L	≤ 20 mg/L	38%

Limits in force (53)

Parameter	Statistic	Limit	Months	Outfall
Temperature, water deg. fahrenheit	monthly maximum	report only (deg F)	all year	001
BOD, 5-day, 20 deg. C	30-day average	≤ 20 mg/L	all year	001
BOD, 5-day, 20 deg. C	daily maximum	≤ 40 mg/L	all year	001
BOD, 5-day, 20 deg. C	30-day average	≤ 133 lb/d	all year	001
BOD, 5-day, 20 deg. C	daily maximum	≤ 400 lb/d	all year	001
pH	monthly minimum	≥ 6 SU	all year	001
pH	monthly maximum	≤ 9 SU	all year	001
Solids, total suspended	30-day average	≤ 25 mg/L	all year	001
Solids, total suspended	daily maximum	≤ 50 mg/L	all year	001
Solids, total suspended	30-day average	≤ 166 lb/d	all year	001
Solids, total suspended	daily maximum	≤ 500 lb/d	all year	001
Nitrogen, ammonia total [as N]	semi-annual average	report only (mg/L)	Mar, Sep	001
Nitrogen, ammonia total [as N]	semi-annual maximum	report only (mg/L)	Mar, Sep	001
Chromium, hexavalent [as Cr]	quarterly average	≤ .1 mg/L	all year	001
Chromium, hexavalent [as Cr]	quarterly maximum	≤ .2 mg/L	all year	001
Chromium, hexavalent [as Cr]	quarterly average	≤ .67 lb/d	all year	001
Chromium, hexavalent [as Cr]	quarterly maximum	≤ 2 lb/d	all year	001
Chromium, total [as Cr]	quarterly average	≤ 1 mg/L	all year	001
Chromium, total [as Cr]	quarterly maximum	≤ 2 mg/L	all year	001
Chromium, total [as Cr]	quarterly average	≤ 6.7 lb/d	all year	001
Chromium, total [as Cr]	quarterly maximum	≤ 20 lb/d	all year	001
Oil and grease	30-day average	≤ 15 mg/L	all year	001
Oil and grease	daily maximum	≤ 30 mg/L	all year	001
Oil and grease	30-day average	≤ 100 lb/d	all year	001
Oil and grease	daily maximum	≤ 300 lb/d	all year	001
Polynuclear Aromatic Hydrocarbons [PAHs]	quarterly maximum	≤ .1 mg/L	all year	001
Polynuclear Aromatic Hydrocarbons [PAHs]	quarterly maximum	≤ 1 lb/d	all year	001
Benzene, ethylbenzene, toluene, xylene combination	quarterly maximum	≤ .75 mg/L	all year	001
Benzene, ethylbenzene, toluene, xylene combination	quarterly maximum	≤ 7.5 lb/d	all year	001
Benzene	quarterly maximum	≤ .05 mg/L	all year	001
Benzene	quarterly maximum	≤ .6 lb/d	all year	001
Phenols	30-day average	≤ .3 mg/L	all year	001
Phenols	daily maximum	≤ .6 mg/L	all year	001
Phenols	30-day average	≤ 2 lb/d	all year	001
Phenols	daily maximum	≤ 6 lb/d	all year	001
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
BOD, 5-day, 20 deg. C	30-day average	≤ 20 mg/L	all year	003
BOD, 5-day, 20 deg. C	daily maximum	≤ 40 mg/L	all year	003
pH	monthly minimum	≥ 6 SU	all year	003
pH	monthly maximum	≤ 9 SU	all year	003
Solids, total suspended	30-day average	≤ 25 mg/L	all year	003
Solids, total suspended	daily maximum	≤ 50 mg/L	all year	003
Copper, total [as Cu]	30-day average	≤ .5 mg/L	all year	003
Copper, total [as Cu]	daily maximum	≤ 1 mg/L	all year	003
Iron, total [as Fe]	30-day average	≤ 2 mg/L	all year	003
Iron, total [as Fe]	daily maximum	≤ 4 mg/L	all year	003
Manganese, total [as Mn]	30-day average	≤ 1 mg/L	all year	003
Manganese, total [as Mn]	daily maximum	≤ 2 mg/L	all year	003
Nickel, total [as Ni]	30-day average	≤ .0095 mg/L	all year	003
Nickel, total [as Ni]	daily maximum	≤ .1565 mg/L	all year	003
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	003
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	003

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/IL0001244 · MCP: https://passage-data.com/mcp