PWSID IL3081943
EXXON MOBIL OIL REFINERY
Non-transient non-community based in Joliet, IL
Service area on file with EPA: Will County. EPA's recorded service area can be incomplete for regional authorities. The cities and counties above are what the utility has filed with EPA; the utility may serve additional areas.
- Population served
- 1,450
- Source
- Groundwater
- Status
- Active
At a glance
Not enough recent test data to classify current risk
No recent lead, copper, or PFAS test data on file from this system. Most other contaminants are tracked through violation reports rather than per-page test tables.
Risk classification follows EPA's published values for safe drinking water, with caution and concern bands reviewed by a clinician. Past resolved violations do not influence this card. See methodology.
Lead service line inventory
No inventory data on file
We do not yet have this utility's published Lead Service Line Inventory on file. The EPA Lead and Copper Rule Improvements (LCRI) required every community water system to publish one by October 16, 2024 and to identify and replace any lead lines within 10 years. How lead enters drinking water.
Phase 1 coverage focuses on the largest NC utilities. Smaller systems will be added; in the meantime, ask your utility for their inventory or check their Consumer Confidence Report.
Lead and copper test results
The most recent measurement per contaminant from EPA's Lead and Copper Rule sampling.
Why only lead and copper, and not arsenic, nitrate, or others?
EPA's bulk SDWIS download is the only nationwide per-system sample data they publish, and it only includes the Lead and Copper Rule table. Values for other regulated contaminants (TTHMs, nitrate, arsenic, etc.) appear on this page only when they trigger a violation. For the full per-system contaminant suite, see the utility's annual Consumer Confidence Report (link further down the page).
No recent Lead and Copper sample data
EPA's national SDWIS bulk dataset does not include Lead and Copper Rule sampling rows for this system in the most recent release. That can mean the system is small enough to be on a reduced sampling schedule, or that recent samples have not yet been submitted to EPA. Check the system's annual Consumer Confidence Report (see below) for the most recent local measurements.
Data from EPA SDWIS (Lead and Copper Rule sample table) , last refreshed May 24, 2026.
Fluoride
We don't yet have this utility's specific fluoridation status from CDC's My Water's Fluoride listing. The figures below describe the broader area, not EXXON MOBIL OIL REFINERY itself.
Area context
Will County, IL (2020 data)
- Community water systems
- 49 of 65 add fluoride
- Population on fluoridated water
- 368,513 of 420,653 (87.6%)
Illinois statewide (2020 data)
- Population on fluoridated water
- 11,457,094 of 11,640,823 (98.4%)
- Community water systems adding fluoride
- 1,639 of 1,815
Look up your specific utility
Illinois shares per-system data on CDC's My Water's Fluoride site. Search by water system to see whether EXXON MOBIL OIL REFINERY adds fluoride.
Data from CDC Water Fluoridation Reporting System (state and county aggregates) , last refreshed May 16, 2026.
Compliance history
EPA-recorded violations against this system over the last 5 years.
How to read this section
Health-based violations are when a measured limit was exceeded; the measured concentration is shown alongside the EPA federal limit where SDWIS published it. Monitoring and reporting items are paperwork issues (missed sample dates, late filings) that do not themselves indicate unsafe water.
No health-based violations
No health-based violations on file in the last 5 years. EPA recorded 147 monitoring or reporting items (paperwork) during the same period.
147 monitoring and reporting item s (paperwork) , 3 still open · these are not health risks
| Period start | Relates to | Item | Status |
|---|---|---|---|
| October 1, 2025 | Trans-1,2-Dichloroethylene | Monitoring, Regular | Resolved |
| October 1, 2025 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | Unaddressed |
| August 1, 2025 | Chlorine | Monitoring and Reporting (DBP) | Resolved |
| August 1, 2025 | Chlorine | Monitoring and Reporting (DBP) | Resolved |
| August 1, 2025 | Revised Total Coliform Rule | Monitoring, Routine (RTCR) | Resolved |
| August 1, 2025 | Revised Total Coliform Rule | Monitoring, Routine (RTCR) | Resolved |
| August 1, 2025 | Revised Total Coliform Rule | Monitoring, Routine (RTCR) | Resolved |
| October 1, 2024 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | Unaddressed |
| October 1, 2024 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | Unaddressed |
| July 1, 2024 | 1,2,4-Trichlorobenzene | Monitoring, Regular | Resolved |
| July 1, 2024 | 1,2,4-Trichlorobenzene | Monitoring, Regular | Resolved |
| July 1, 2024 | O-Dichlorobenzene | Monitoring, Regular | Resolved |
| July 1, 2024 | O-Dichlorobenzene | Monitoring, Regular | Resolved |
| July 1, 2024 | 1,1-Dichloroethylene | Monitoring, Regular | Resolved |
| July 1, 2024 | 1,1-Dichloroethylene | Monitoring, Regular | Resolved |
| July 1, 2024 | Trans-1,2-Dichloroethylene | Monitoring, Regular | Resolved |
| July 1, 2024 | Trans-1,2-Dichloroethylene | Monitoring, Regular | Resolved |
| July 1, 2024 | 1,2-Dichloroethane | Monitoring, Regular | Resolved |
| July 1, 2024 | 1,2-Dichloroethane | Monitoring, Regular | Resolved |
| July 1, 2024 | Carbon Tetrachloride | Monitoring, Regular | Resolved |
| July 1, 2024 | Carbon Tetrachloride | Monitoring, Regular | Resolved |
| July 1, 2024 | Trichloroethylene | Monitoring, Regular | Resolved |
| July 1, 2024 | Trichloroethylene | Monitoring, Regular | Resolved |
| July 1, 2024 | Toluene | Monitoring, Regular | Resolved |
| July 1, 2024 | Toluene | Monitoring, Regular | Resolved |
| July 1, 2024 | Ethylbenzene | Monitoring, Regular | Resolved |
| July 1, 2024 | Ethylbenzene | Monitoring, Regular | Resolved |
| July 1, 2024 | Chlorobenzene | Monitoring, Regular | Resolved |
| July 1, 2024 | Chlorobenzene | Monitoring, Regular | Resolved |
| July 1, 2024 | 1,2-Dichloropropane | Monitoring, Regular | Resolved |
| July 1, 2024 | 1,2-Dichloropropane | Monitoring, Regular | Resolved |
| July 1, 2024 | Dichloromethane | Monitoring, Regular | Resolved |
| July 1, 2024 | Dichloromethane | Monitoring, Regular | Resolved |
| July 1, 2024 | P-Dichlorobenzene | Monitoring, Regular | Resolved |
| July 1, 2024 | P-Dichlorobenzene | Monitoring, Regular | Resolved |
| July 1, 2024 | Cis-1,2-Dichloroethylene | Monitoring, Regular | Resolved |
| July 1, 2024 | Cis-1,2-Dichloroethylene | Monitoring, Regular | Resolved |
| July 1, 2024 | 1,1,2-Trichloroethane | Monitoring, Regular | Resolved |
| July 1, 2024 | 1,1,2-Trichloroethane | Monitoring, Regular | Resolved |
| July 1, 2024 | Styrene | Monitoring, Regular | Resolved |
| July 1, 2024 | Styrene | Monitoring, Regular | Resolved |
| July 1, 2024 | Revised Total Coliform Rule | Report Sample Result/Fail Monitor (RTCR) | Resolved |
| July 1, 2024 | Revised Total Coliform Rule | Report Sample Result/Fail Monitor (RTCR) | Resolved |
| July 1, 2024 | Revised Total Coliform Rule | Report Sample Result/Fail Monitor (RTCR) | Resolved |
| July 1, 2024 | Revised Total Coliform Rule | Report Sample Result/Fail Monitor (RTCR) | Resolved |
| July 1, 2024 | Vinyl Chloride | Monitoring, Regular | Resolved |
| July 1, 2024 | Vinyl Chloride | Monitoring, Regular | Resolved |
| July 1, 2024 | Tetrachloroethylene | Monitoring, Regular | Resolved |
| July 1, 2024 | Tetrachloroethylene | Monitoring, Regular | Resolved |
| July 1, 2024 | 1,1,1-Trichloroethane | Monitoring, Regular | Resolved |
| July 1, 2024 | 1,1,1-Trichloroethane | Monitoring, Regular | Resolved |
| July 1, 2024 | Benzene | Monitoring, Regular | Resolved |
| July 1, 2024 | Benzene | Monitoring, Regular | Resolved |
| July 1, 2024 | Xylenes, Total | Monitoring, Regular | Resolved |
| July 1, 2024 | Xylenes, Total | Monitoring, Regular | Resolved |
| November 1, 2023 | Revised Total Coliform Rule | Monitoring, Routine (RTCR) | Resolved |
| November 1, 2023 | Revised Total Coliform Rule | Monitoring, Routine (RTCR) | Resolved |
| November 1, 2023 | Revised Total Coliform Rule | Monitoring, Routine (RTCR) | Resolved |
| November 1, 2023 | Revised Total Coliform Rule | Monitoring, Routine (RTCR) | Resolved |
| January 1, 2023 | Xylenes, Total | Monitoring, Regular | Resolved |
| January 1, 2023 | Xylenes, Total | Monitoring, Regular | Resolved |
| January 1, 2023 | Dichloromethane | Monitoring, Regular | Resolved |
| January 1, 2023 | Dichloromethane | Monitoring, Regular | Resolved |
| January 1, 2023 | O-Dichlorobenzene | Monitoring, Regular | Resolved |
| January 1, 2023 | O-Dichlorobenzene | Monitoring, Regular | Resolved |
| January 1, 2023 | P-Dichlorobenzene | Monitoring, Regular | Resolved |
| January 1, 2023 | P-Dichlorobenzene | Monitoring, Regular | Resolved |
| January 1, 2023 | 1,2-Dichloroethane | Monitoring, Regular | Resolved |
| January 1, 2023 | 1,1,2-Trichloroethane | Monitoring, Regular | Resolved |
| January 1, 2023 | 1,1,2-Trichloroethane | Monitoring, Regular | Resolved |
| January 1, 2023 | Tetrachloroethylene | Monitoring, Regular | Resolved |
| January 1, 2023 | Tetrachloroethylene | Monitoring, Regular | Resolved |
| January 1, 2023 | Toluene | Monitoring, Regular | Resolved |
| January 1, 2023 | Toluene | Monitoring, Regular | Resolved |
| January 1, 2023 | Ethylbenzene | Monitoring, Regular | Resolved |
| January 1, 2023 | Ethylbenzene | Monitoring, Regular | Resolved |
| January 1, 2023 | Styrene | Monitoring, Regular | Resolved |
| January 1, 2023 | Styrene | Monitoring, Regular | Resolved |
| January 1, 2023 | 1,2-Dichloroethane | Monitoring, Regular | Resolved |
| January 1, 2023 | 1,1,1-Trichloroethane | Monitoring, Regular | Resolved |
| January 1, 2023 | 1,1,1-Trichloroethane | Monitoring, Regular | Resolved |
| January 1, 2023 | Cis-1,2-Dichloroethylene | Monitoring, Regular | Resolved |
| January 1, 2023 | Cis-1,2-Dichloroethylene | Monitoring, Regular | Resolved |
| January 1, 2023 | 1,1-Dichloroethylene | Monitoring, Regular | Resolved |
| January 1, 2023 | 1,1-Dichloroethylene | Monitoring, Regular | Resolved |
| January 1, 2023 | Chlorobenzene | Monitoring, Regular | Resolved |
| January 1, 2023 | Chlorobenzene | Monitoring, Regular | Resolved |
| January 1, 2023 | Trans-1,2-Dichloroethylene | Monitoring, Regular | Resolved |
| January 1, 2023 | Trans-1,2-Dichloroethylene | Monitoring, Regular | Resolved |
| January 1, 2023 | Carbon Tetrachloride | Monitoring, Regular | Resolved |
| January 1, 2023 | Carbon Tetrachloride | Monitoring, Regular | Resolved |
| January 1, 2023 | Trichloroethylene | Monitoring, Regular | Resolved |
| January 1, 2023 | Trichloroethylene | Monitoring, Regular | Resolved |
| January 1, 2023 | 1,2-Dichloropropane | Monitoring, Regular | Resolved |
| January 1, 2023 | 1,2-Dichloropropane | Monitoring, Regular | Resolved |
| January 1, 2023 | Vinyl Chloride | Monitoring, Regular | Resolved |
| January 1, 2023 | Vinyl Chloride | Monitoring, Regular | Resolved |
| January 1, 2023 | Benzene | Monitoring, Regular | Resolved |
| January 1, 2023 | Benzene | Monitoring, Regular | Resolved |
| January 1, 2023 | 1,2,4-Trichlorobenzene | Monitoring, Regular | Resolved |
| January 1, 2023 | 1,2,4-Trichlorobenzene | Monitoring, Regular | Resolved |
| January 1, 2022 | Tthm | Monitoring and Reporting (DBP) | Resolved |
| January 1, 2022 | Tthm | Monitoring and Reporting (DBP) | Resolved |
| January 1, 2022 | Total Haloacetic Acids (Haa5) | Monitoring and Reporting (DBP) | Resolved |
| January 1, 2022 | Total Haloacetic Acids (Haa5) | Monitoring and Reporting (DBP) | Resolved |
| January 1, 2022 | Cis-1,2-Dichloroethylene | Monitoring, Regular | Resolved |
| January 1, 2022 | Cis-1,2-Dichloroethylene | Monitoring, Regular | Resolved |
| January 1, 2022 | Xylenes, Total | Monitoring, Regular | Resolved |
| January 1, 2022 | Xylenes, Total | Monitoring, Regular | Resolved |
| January 1, 2022 | Dichloromethane | Monitoring, Regular | Resolved |
| January 1, 2022 | Dichloromethane | Monitoring, Regular | Resolved |
| January 1, 2022 | O-Dichlorobenzene | Monitoring, Regular | Resolved |
| January 1, 2022 | O-Dichlorobenzene | Monitoring, Regular | Resolved |
| January 1, 2022 | Vinyl Chloride | Monitoring, Regular | Resolved |
| January 1, 2022 | Vinyl Chloride | Monitoring, Regular | Resolved |
| January 1, 2022 | 1,1,1-Trichloroethane | Monitoring, Regular | Resolved |
| January 1, 2022 | 1,1,1-Trichloroethane | Monitoring, Regular | Resolved |
| January 1, 2022 | Carbon Tetrachloride | Monitoring, Regular | Resolved |
| January 1, 2022 | Carbon Tetrachloride | Monitoring, Regular | Resolved |
| January 1, 2022 | 1,2-Dichloropropane | Monitoring, Regular | Resolved |
| January 1, 2022 | 1,2-Dichloropropane | Monitoring, Regular | Resolved |
| January 1, 2022 | Trichloroethylene | Monitoring, Regular | Resolved |
| January 1, 2022 | Trichloroethylene | Monitoring, Regular | Resolved |
| January 1, 2022 | Tetrachloroethylene | Monitoring, Regular | Resolved |
| January 1, 2022 | Tetrachloroethylene | Monitoring, Regular | Resolved |
| January 1, 2022 | Chlorobenzene | Monitoring, Regular | Resolved |
| January 1, 2022 | Chlorobenzene | Monitoring, Regular | Resolved |
| January 1, 2022 | 1,1,2-Trichloroethane | Monitoring, Regular | Resolved |
| January 1, 2022 | 1,1,2-Trichloroethane | Monitoring, Regular | Resolved |
| January 1, 2022 | Toluene | Monitoring, Regular | Resolved |
| January 1, 2022 | Toluene | Monitoring, Regular | Resolved |
| January 1, 2022 | 1,1-Dichloroethylene | Monitoring, Regular | Resolved |
| January 1, 2022 | 1,1-Dichloroethylene | Monitoring, Regular | Resolved |
| January 1, 2022 | Trans-1,2-Dichloroethylene | Monitoring, Regular | Resolved |
| January 1, 2022 | Trans-1,2-Dichloroethylene | Monitoring, Regular | Resolved |
| January 1, 2022 | Benzene | Monitoring, Regular | Resolved |
| January 1, 2022 | Benzene | Monitoring, Regular | Resolved |
| January 1, 2022 | Styrene | Monitoring, Regular | Resolved |
| January 1, 2022 | Styrene | Monitoring, Regular | Resolved |
| January 1, 2022 | P-Dichlorobenzene | Monitoring, Regular | Resolved |
| January 1, 2022 | P-Dichlorobenzene | Monitoring, Regular | Resolved |
| January 1, 2022 | 1,2,4-Trichlorobenzene | Monitoring, Regular | Resolved |
| January 1, 2022 | 1,2,4-Trichlorobenzene | Monitoring, Regular | Resolved |
| January 1, 2022 | 1,2-Dichloroethane | Monitoring, Regular | Resolved |
| January 1, 2022 | 1,2-Dichloroethane | Monitoring, Regular | Resolved |
| January 1, 2022 | Ethylbenzene | Monitoring, Regular | Resolved |
| January 1, 2022 | Ethylbenzene | Monitoring, Regular | Resolved |
160 older violation s (5-10 years ago) · all paperwork (monitoring/reporting), none health-based , all resolved
| Period start | Relates to | Item | Measured level | Status |
|---|---|---|---|---|
| April 1, 2020 | Revised Total Coliform Rule | Monitoring, Routine (RTCR) | — | Resolved |
| April 1, 2020 | Revised Total Coliform Rule | Monitoring, Routine (RTCR) | — | Resolved |
| April 1, 2020 | Revised Total Coliform Rule | Monitoring, Routine (RTCR) | — | Resolved |
| January 1, 2020 | Thallium, Total | Monitoring, Regular | — | Resolved |
| January 1, 2020 | Thallium, Total | Monitoring, Regular | — | Resolved |
| January 1, 2020 | Thallium, Total | Monitoring, Regular | — | Resolved |
| January 1, 2020 | Thallium, Total | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Total Haloacetic Acids (Haa5) | Monitoring and Reporting (DBP) | — | Resolved |
| January 1, 2019 | Total Haloacetic Acids (Haa5) | Monitoring and Reporting (DBP) | — | Resolved |
| January 1, 2019 | Cis-1,2-Dichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Cis-1,2-Dichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | O-Dichlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | O-Dichlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | P-Dichlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | P-Dichlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Trans-1,2-Dichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Trans-1,2-Dichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | 1,1,1-Trichloroethane | Monitoring, Regular | — | Resolved |
| January 1, 2019 | 1,1,1-Trichloroethane | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Carbon Tetrachloride | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Carbon Tetrachloride | Monitoring, Regular | — | Resolved |
| January 1, 2019 | 1,2-Dichloropropane | Monitoring, Regular | — | Resolved |
| January 1, 2019 | 1,2-Dichloropropane | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Trichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Trichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | 1,1,2-Trichloroethane | Monitoring, Regular | — | Resolved |
| January 1, 2019 | 1,1,2-Trichloroethane | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Chlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Chlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Benzene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Benzene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Toluene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Toluene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Ethylbenzene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Ethylbenzene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Total Haloacetic Acids (Haa5) | Monitoring and Reporting (DBP) | — | Resolved |
| January 1, 2019 | Cis-1,2-Dichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | O-Dichlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | P-Dichlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Trans-1,2-Dichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | 1,1,1-Trichloroethane | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Carbon Tetrachloride | Monitoring, Regular | — | Resolved |
| January 1, 2019 | 1,2-Dichloropropane | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Trichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | 1,1,2-Trichloroethane | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Chlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Benzene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Toluene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Ethylbenzene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Vinyl Chloride | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Vinyl Chloride | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Vinyl Chloride | Monitoring, Regular | — | Resolved |
| January 1, 2019 | 1,2,4-Trichlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | 1,2,4-Trichlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | 1,2,4-Trichlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Styrene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Styrene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Styrene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Tthm | Monitoring and Reporting (DBP) | — | Resolved |
| January 1, 2019 | Tthm | Monitoring and Reporting (DBP) | — | Resolved |
| January 1, 2019 | Tthm | Monitoring and Reporting (DBP) | — | Resolved |
| January 1, 2019 | Dichloromethane | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Dichloromethane | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Dichloromethane | Monitoring, Regular | — | Resolved |
| January 1, 2019 | 1,2-Dichloroethane | Monitoring, Regular | — | Resolved |
| January 1, 2019 | 1,2-Dichloroethane | Monitoring, Regular | — | Resolved |
| January 1, 2019 | 1,2-Dichloroethane | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Xylenes, Total | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Xylenes, Total | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Xylenes, Total | Monitoring, Regular | — | Resolved |
| January 1, 2019 | 1,1-Dichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | 1,1-Dichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | 1,1-Dichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Tetrachloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Tetrachloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2019 | Tetrachloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Trans-1,2-Dichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Trans-1,2-Dichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,2-Dichloroethane | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,2-Dichloroethane | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,1,1-Trichloroethane | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,1,1-Trichloroethane | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,2-Dichloropropane | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,2-Dichloropropane | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Trichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Trichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Tetrachloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Tetrachloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Benzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Benzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Toluene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Toluene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Xylenes, Total | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Xylenes, Total | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Dichloromethane | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Dichloromethane | Monitoring, Regular | — | Resolved |
| January 1, 2017 | O-Dichlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | O-Dichlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | P-Dichlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | P-Dichlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Vinyl Chloride | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Vinyl Chloride | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Cis-1,2-Dichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Cis-1,2-Dichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Trans-1,2-Dichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,2-Dichloroethane | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,1,1-Trichloroethane | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,2-Dichloropropane | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Trichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Tetrachloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Benzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Toluene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Cis-1,2-Dichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Xylenes, Total | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Dichloromethane | Monitoring, Regular | — | Resolved |
| January 1, 2017 | O-Dichlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | P-Dichlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Vinyl Chloride | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Trans-1,2-Dichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,2-Dichloroethane | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,1,1-Trichloroethane | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,2-Dichloropropane | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Trichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Tetrachloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Benzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Toluene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Cis-1,2-Dichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Xylenes, Total | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Dichloromethane | Monitoring, Regular | — | Resolved |
| January 1, 2017 | O-Dichlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | P-Dichlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Vinyl Chloride | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,1,2-Trichloroethane | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,1,2-Trichloroethane | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,1,2-Trichloroethane | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,1,2-Trichloroethane | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Carbon Tetrachloride | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Carbon Tetrachloride | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Carbon Tetrachloride | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Carbon Tetrachloride | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Styrene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Styrene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,1-Dichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,1-Dichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Chlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Chlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,1-Dichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Chlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Styrene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,1-Dichloroethylene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Chlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Styrene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Ethylbenzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Ethylbenzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Ethylbenzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | Ethylbenzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,2,4-Trichlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,2,4-Trichlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,2,4-Trichlorobenzene | Monitoring, Regular | — | Resolved |
| January 1, 2017 | 1,2,4-Trichlorobenzene | Monitoring, Regular | — | Resolved |
Data from EPA SDWIS (violation records) , last refreshed May 24, 2026.
Where to see every contaminant this utility tested for
EPA's bulk SDWIS dataset gives MyTapWater.us per-system measured values for lead and copper, plus violation records for everything else. To see every regulated contaminant this utility tested for in the past year (TTHMs, HAA5, nitrate, arsenic, fluoride, chromium, etc.) with measured values, read the utility's Consumer Confidence Report (CCR).
Every community water system is required by EPA to publish a CCR annually, by July 1, listing every contaminant they sampled, the measured value, the federal limit, and any health-based exceedances. Most utilities post the report online; some mail it with your bill.
How to find EXXON MOBIL OIL REFINERY's CCR:
- Search the web for "EXXON MOBIL OIL REFINERY consumer confidence report" . The PDF is usually on the utility's own website.
- Or call the utility directly. Their phone number is in the contact section below.
Other water systems in Will County, IL
Compare nearby utilities by population served.
- JOLIET
160k served · JOLIET
- IL AMERICAN-WEST SUBURBAN
74k served · BOLINGBROOK
- ROMEOVILLE
50k served · ROMEOVILLE
- PLAINFIELD
50k served · PLAINFIELD
- NEW LENOX
28k served · NEW LENOX
Contact this utility
Public administrative contact information for this water system, as filed with the EPA. Use this to ask about your service line, request your home's lead status, or report a water quality issue.
- Administrator
- HANRAHAN, AMY
- Phone
- 815-521-7430
- Mailing address
- PO BOX 874IL 55 & ARSENAL RDJOLIET, IL 60434
Where this page's data comes from
Bundle released 2026-Q2, regenerated May 24, 2026. Each section above also shows its own source date so you can tell at a glance how fresh that part of the page is.
- EPA SDWIS bulk download — last refreshed May 24, 2026 (system info, violations, lead and copper samples).
- CDC Water Fluoridation Reporting System — last refreshed May 16, 2026 (state and county fluoridation aggregates).
Every value on this page is cross-verified before publication; read our methodology for the verification steps and corrections process.