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EXXON MOBIL OIL REFINERY

Illinois — Non-Transient Non-Community — PWSID: IL3081943

System Information

PWSIDIL3081943
System NameEXXON MOBIL OIL REFINERY
System TypeNon-Transient Non-Community
Water SourceGround Water
Activity StatusActive
Owner TypePrivate
EPA Region05
Serves SchoolNo
WholesalerNo
First ReportedJun 18, 1981
Last ReportedNov 25, 2025

Location & Contact

StateIllinois
CityJOLIET
ZIP Code60434
AddressPO BOX 874
OrganizationHANRAHAN, AMY
Phone815-521-7430

Population & Service

Population Served1,450
Service Connections38

Drinking Water Violations (82)

This water system has 82 violations recorded in the EPA SDWIS database.

Begin Date End Date Contaminant Category Health-Based Major Measured Federal MCL State MCL Status Return to Compliance Rule
Aug 1, 2025 Aug 31, 2025 Chlorine MR No Yes — 4.0 mg/L — Archived Aug 31, 2025 Stage 1 Disinfectants and Disinfection Byproducts Rule
Aug 1, 2025 Aug 31, 2025 Chlorine MR No Yes — 4.0 mg/L — Archived Aug 31, 2025 Stage 1 Disinfectants and Disinfection Byproducts Rule
Aug 1, 2025 Aug 31, 2025 Revised Total Coliform Rule MON No Yes — — — Resolved Aug 31, 2025 Revised Total Coliform Rule
Aug 1, 2025 Aug 31, 2025 Revised Total Coliform Rule MON No Yes — — — Resolved Aug 31, 2025 Revised Total Coliform Rule
Aug 1, 2025 Aug 31, 2025 Revised Total Coliform Rule MON No Yes — — — Resolved Aug 31, 2025 Revised Total Coliform Rule
Apr 1, 2025 Jun 30, 2025 Benzene MR No Yes — 0.005 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Trichloroethylene MR No Yes — 0.005 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Tetrachloroethylene MR No Yes — 0.005 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Tetrachloroethylene MR No Yes — 0.005 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Benzene MR No Yes — 0.005 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Benzene MR No Yes — 0.005 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Toluene MR No Yes — 1 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Toluene MR No Yes — 1 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Toluene MR No Yes — 1 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Styrene MR No Yes — 0.1 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Styrene MR No Yes — 0.1 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Styrene MR No Yes — 0.1 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 1,2-Dichloropropane MR No Yes — 0.005 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 DICHLOROMETHANE MR No Yes — 0.005 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 1,1,2-Trichloroethane MR No Yes — 0.005 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Vinyl chloride MR No Yes — 0.002 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Vinyl chloride MR No Yes — 0.002 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Vinyl chloride MR No Yes — 0.002 mg/L — Resolved Jun 30, 2025 Volatile Organic Chemicals
Oct 1, 2024 — Lead and Copper Rule MR No No — TT — Unaddressed — Lead and Copper Rule
Oct 1, 2024 — Lead and Copper Rule MR No No — TT — Unaddressed — Lead and Copper Rule
Jul 1, 2024 — Revised Total Coliform Rule RPT No No — — — Resolved Feb 28, 2025 Revised Total Coliform Rule
Jul 1, 2024 Sep 30, 2024 Vinyl chloride MR No Yes — 0.002 mg/L — Resolved Sep 30, 2024 Volatile Organic Chemicals
Jul 1, 2024 Sep 30, 2024 Tetrachloroethylene MR No Yes — 0.005 mg/L — Resolved Sep 30, 2024 Volatile Organic Chemicals
Jul 1, 2024 Sep 30, 2024 Tetrachloroethylene MR No Yes — 0.005 mg/L — Resolved Sep 30, 2024 Volatile Organic Chemicals
Jul 1, 2024 Sep 30, 2024 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Sep 30, 2024 Volatile Organic Chemicals
Jul 1, 2024 Sep 30, 2024 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Sep 30, 2024 Volatile Organic Chemicals
Jul 1, 2024 — Revised Total Coliform Rule RPT No No — — — Resolved Feb 28, 2025 Revised Total Coliform Rule
Jul 1, 2024 Sep 30, 2024 1,1,2-Trichloroethane MR No Yes — 0.005 mg/L — Resolved Sep 30, 2024 Volatile Organic Chemicals
Jul 1, 2024 Sep 30, 2024 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Resolved Sep 30, 2024 Volatile Organic Chemicals
Jul 1, 2024 Sep 30, 2024 1,1-Dichloroethylene MR No Yes — 0.007 mg/L — Resolved Sep 30, 2024 Volatile Organic Chemicals
Jul 1, 2024 Sep 30, 2024 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Sep 30, 2024 Volatile Organic Chemicals

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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