No open health-based violations on EPA record in the last 10 years.
Serves about 2,193 people (1,034 connections) with surface water bought from Litchfield.
From EPA's record for IL1170700. PurityMap is independent of Mount Olive.
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3 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From December 2025 | Interim Enhanced Surface Water Treatment Rule | – | – | Resolved |
| From November 2025 | Interim Enhanced Surface Water Treatment Rule | – | – | Resolved |
| From October 2025 | Interim Enhanced Surface Water Treatment Rule | – | – | Resolved |
EPA required this system to test for 30 unregulated and emerging contaminants, from February 2023 to November 2023.
| 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 | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| 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 | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| 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 | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| 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 | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| 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 | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| 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 | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| 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 | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-13 to 2023-11-06 | UCMR5 Analytical Results: MOUNT OLIVE (IL1170700) |
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 →Mount Olive's phone number on EPA record is 618-973-0633. Its mailing address is CERTOP INC, 478 ROSEWOOD LANE, AVISTON, IL 62216.
According to EPA's record, Mount Olive uses surface water bought from Litchfield.
EPA's record shows 3 health-based violations for Mount Olive in the 10 years to July 9, 2026. No open health-based violations on EPA record in the last 10 years. EPA also lists 12 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Mount Olive's latest lead and copper round, which ended in June 2025, was 7.8 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Mount Olive. Its phone number on EPA record is 618-973-0633. Its mailing address on EPA record is CERTOP INC, 478 ROSEWOOD LANE, AVISTON, IL 62216. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.