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Union Pacific Railroad

Switching And Terminal Services, Melrose Park, Illinois. NPDES permit IL0002127, in force until May 31, 2029. Last 12 months: no values over a limit, 2 of 7 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form 0 quarterly (24 values), form P quarterly (80 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 1 of 8 reports late

Limits in force (104)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
pHmonthly minimum≥ 6.5 SUall year
pHmonthly minimum≥ 6.5 SUall year
pHmonthly maximum≤ 9 SUall year
pHmonthly maximum≤ 9 SUall year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Oil & Grease30-day average≤ 15 mg/Lall year
Oil & Grease30-day average≤ 15 mg/Lall year
Oil & Greasedaily maximum≤ 30 mg/Lall year
Oil & Greasedaily maximum≤ 30 mg/Lall year
Toluenedaily maximumreport only (mg/L)all year
Toluenedaily maximumreport only (mg/L)all year
Benzenedaily maximumreport only (mg/L)all year
Benzenedaily maximumreport only (mg/L)all year
Ethylbenzenedaily maximumreport only (mg/L)all year
Ethylbenzenedaily maximumreport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/L)all year
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/L)all year
Perfluorobutanoic acid (PFBA)daily maximumreport only (ng/L)all year
Perfluorobutanoic acid (PFBA)daily maximumreport only (ng/L)all year
Perfluorooctanesulfonamide (PFOSA)daily maximumreport only (ng/L)all year
Perfluorooctanesulfonamide (PFOSA)daily maximumreport only (ng/L)all year
Perfluoropentanoic acid (PFPeA)daily maximumreport only (ng/L)all year
Perfluoropentanoic acid (PFPeA)daily maximumreport only (ng/L)all year
Perfluorohexanoic acid (PFHxA)daily maximumreport only (ng/L)all year
Perfluorohexanoic acid (PFHxA)daily maximumreport only (ng/L)all year
Perfluoroheptanoic acid (PFHpA)daily maximumreport only (ng/L)all year
Perfluoroheptanoic acid (PFHpA)daily maximumreport only (ng/L)all year
Perfluorononanoic acid (PFNA)daily maximumreport only (ng/L)all year
Perfluorononanoic acid (PFNA)daily maximumreport only (ng/L)all year
Perfluorodecanoic acid (PFDA)daily maximumreport only (ng/L)all year
Perfluorodecanoic acid (PFDA)daily maximumreport only (ng/L)all year
Perfluoroundecanoic acid (PFUnA)daily maximumreport only (ng/L)all year
Perfluoroundecanoic acid (PFUnA)daily maximumreport only (ng/L)all year
Perfluorododecanoic acid (PFDoA)daily maximumreport only (ng/L)all year
Perfluorododecanoic acid (PFDoA)daily maximumreport only (ng/L)all year
Perfluorotridecanoic acid (PFTrDA)daily maximumreport only (ng/L)all year
Perfluorotridecanoic acid (PFTrDA)daily maximumreport only (ng/L)all year
Perfluorotetradecanoic acid (PFTeDA)daily maximumreport only (ng/L)all year
Perfluorotetradecanoic acid (PFTeDA)daily maximumreport only (ng/L)all year
N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)daily maximumreport only (ng/L)all year
N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)daily maximumreport only (ng/L)all year
N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)daily maximumreport only (ng/L)all year
N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)daily maximumreport only (ng/L)all year
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)daily maximumreport only (ng/L)all year
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)daily maximumreport only (ng/L)all year
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)daily maximumreport only (ng/L)all year
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)daily maximumreport only (ng/L)all year
Perfluorobutanesulfonic acid (PFBS)daily maximumreport only (ng/L)all year
Perfluorobutanesulfonic acid (PFBS)daily maximumreport only (ng/L)all year
Perfluorodecanesulfonic acid (PFDS)daily maximumreport only (ng/L)all year
Perfluorodecanesulfonic acid (PFDS)daily maximumreport only (ng/L)all year
Perfluoroheptanesulfonic acid (PFHpS)daily maximumreport only (ng/L)all year
Perfluoroheptanesulfonic acid (PFHpS)daily maximumreport only (ng/L)all year
Perfluorohexanesulfonic acid (PFHxS)daily maximumreport only (ng/L)all year
Perfluorohexanesulfonic acid (PFHxS)daily maximumreport only (ng/L)all year
Perfluorooctanesulfonic acid (PFOS)daily maximumreport only (ng/L)all year
Perfluorooctanesulfonic acid (PFOS)daily maximumreport only (ng/L)all year
1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)daily maximumreport only (ng/L)all year
1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)daily maximumreport only (ng/L)all year
1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)daily maximumreport only (ng/L)all year
1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)daily maximumreport only (ng/L)all year
1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)daily maximumreport only (ng/L)all year
1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)daily maximumreport only (ng/L)all year
Perfluoropentanesulfonic acid (PFPeS)daily maximumreport only (ng/L)all year
Perfluoropentanesulfonic acid (PFPeS)daily maximumreport only (ng/L)all year
Perfluorononanesulfonic acid (PFNS)daily maximumreport only (ng/L)all year
Perfluorononanesulfonic acid (PFNS)daily maximumreport only (ng/L)all year
Hexafluoropropylene oxide dimer acid (HFPO-DA)daily maximumreport only (ng/L)all year
Hexafluoropropylene oxide dimer acid (HFPO-DA)daily maximumreport only (ng/L)all year
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)daily maximumreport only (ng/L)all year
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)daily maximumreport only (ng/L)all year
Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)daily maximumreport only (ng/L)all year
Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)daily maximumreport only (ng/L)all year
Perfluorododecanesulfonic acid (PFDoS)daily maximumreport only (ng/L)all year
Perfluorododecanesulfonic acid (PFDoS)daily maximumreport only (ng/L)all year
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)daily maximumreport only (ng/L)all year
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)daily maximumreport only (ng/L)all year
N-methyl perfluorooctanesulfonamide (NMeFOSA)daily maximumreport only (ng/L)all year
N-methyl perfluorooctanesulfonamide (NMeFOSA)daily maximumreport only (ng/L)all year
N-ethyl perfluorooctanesulfonamide (NEtFOSA)daily maximumreport only (ng/L)all year
N-ethyl perfluorooctanesulfonamide (NEtFOSA)daily maximumreport only (ng/L)all year
Xylene [mix of m+o+p]daily maximum≤ .92 mg/Lall year
Xylene [mix of m+o+p]daily maximum≤ .92 mg/Lall year
3-Perfluoropropyl propanoic acid (3:3 FTCA)daily maximumreport only (ng/L)all year
3-Perfluoropropyl propanoic acid (3:3 FTCA)daily maximumreport only (ng/L)all year
Perfluoro-3-methoxypropanoic acid (PFMPA)daily maximumreport only (ng/L)all year
Perfluoro-3-methoxypropanoic acid (PFMPA)daily maximumreport only (ng/L)all year
9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)daily maximumreport only (ng/L)all year
9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)daily maximumreport only (ng/L)all year
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)daily maximumreport only (ng/L)all year
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)daily maximumreport only (ng/L)all year
3-Perfluoroheptyl propanoic acid (7:3 FTCA)daily maximumreport only (ng/L)all year
3-Perfluoroheptyl propanoic acid (7:3 FTCA)daily maximumreport only (ng/L)all year
Perfluoro-4-methoxybutanoic acid (PFMBA)daily maximumreport only (ng/L)all year
Perfluoro-4-methoxybutanoic acid (PFMBA)daily maximumreport only (ng/L)all year
2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)daily maximumreport only (ng/L)all year
2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)daily maximumreport only (ng/L)all year

How strict are these limits?

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

Same industry: the 8 Railroad Transportation permits in Illinois.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IL0002127 · MCP: https://passage-data.com/mcp