No health-based violations on EPA record since 2016.
Serves about 6,940 people (1,712 connections) with surface water bought from Darien.
From EPA's record for IL0430060. PurityMap is independent of Southeast Regional Water Facility.
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No health-based violations in the last 10 years, from EPA's SDWIS compliance database.
EPA required this system to test for 30 unregulated and emerging contaminants, from March 2025 to September 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| Lithium | < 9 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| Perfluorobutanesulfonic acid (PFBS) | < 3 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-04 to 2025-09-08 | UCMR5 Analytical Results: SOUTHEAST REGIONAL WATER FACILITY (IL0430060) |
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
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Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
Turnaround: 5 minutes
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638 · 2–4 business days after the lab receives it
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
Get PurityMap updates about this water system.
Follow this water →Southeast Regional Water Facility's phone number on EPA record is 630-964-7503. Its mailing address is 17W440 North Frontage Rd, DARIEN, IL 60561.
According to EPA's record, Southeast Regional Water Facility uses surface water bought from Darien.
No health-based violations on EPA record since 2016. EPA also lists 1 missed or late test or report in 10 years. The record comes from EPA's SDWIS compliance database.
Lead was not detected at the 90th percentile of tap samples in Southeast Regional Water Facility's latest lead and copper round, which ended in December 2025. The federal action level is 15 µg/L.
PurityMap has no verified website for Southeast Regional Water Facility. Its phone number on EPA record is 630-964-7503. Its mailing address on EPA record is 17W440 North Frontage Rd, DARIEN, IL 60561. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.