Total trihalomethanes (TTHM) above the legal limit in the period starting January 2026.
Serves about 5,565 people (2,288 connections) with groundwater from its own wells, and buys water from Burnside PWD.
From EPA's record for IL1515050. PurityMap is independent of Millstone PWD.
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5 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Jan–Mar 2026 | Total trihalomethanes (TTHM) | 0.083 mg/L | 0.080 mg/L | Archived |
| Jul–Sep 2025 | Total trihalomethanes (TTHM) | 0.09 mg/L | 0.080 mg/L | Resolved |
| From January 2023 | Arsenic | 11 µg/L | 0.010 mg/L | Resolved |
| From April 2022 | Lead and Copper Rule | – | TT | Resolved |
| From March 2022 | Lead and Copper Rule | – | TT | Resolved |
EPA required this system to test for 30 unregulated and emerging contaminants, from February 2025 to August 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 | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| 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 | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| 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 | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| 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 | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| 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 | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| 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 | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| 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 | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-04 to 2025-08-04 | UCMR5 Analytical Results: MILLSTONE PWD (IL1515050) |
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 →Millstone PWD's phone number on EPA record is 618-201-1252. Its mailing address is 243 E Elm St, NASHVILLE, IL 62263.
According to EPA's record, Millstone PWD uses groundwater from its own wells, and buys water from Burnside PWD.
EPA's record shows 5 health-based violations for Millstone PWD in the 10 years to July 9, 2026. Total trihalomethanes (TTHM) were above the legal limit in the period starting January 2026. EPA also lists 6 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Millstone PWD's latest lead and copper round, which ended in December 2025, was 4.11 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Millstone PWD. Its phone number on EPA record is 618-201-1252. Its mailing address on EPA record is 243 E Elm St, NASHVILLE, IL 62263. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.