No health-based violations on EPA record since 2016.
Serves about 1,111,000 people (376,501 connections) with surface water from its own intake, and buys water from City of St. Louis Water Division.
From EPA's record for MO6010716. PurityMap is independent of MO American St Louis St Charles Counties.
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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 2024 to December 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 86.8 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Above the referenced health-based guidance value | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| Perfluorobutanoic acid (PFBA) | 5.1 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| 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 | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| 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 | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| 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 | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| 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 | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| 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 | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| 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 | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-03-07 to 2024-12-13 | UCMR5 Analytical Results: MO AMERICAN ST LOUIS ST CHARLES COUNTIES (MO6010716) |
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 →MO American St Louis St Charles Counties's phone number on EPA record is 314-548-0199. Its mailing address is 901 HOG HOLLOW RD, CHESTERFIELD, MO 63017-0000.
According to EPA's record, MO American St Louis St Charles Counties uses surface water from its own intake, and buys water from City of St. Louis Water Division.
No health-based violations on EPA record since 2016. The record comes from EPA's SDWIS compliance database.
Lead was not detected at the 90th percentile of tap samples in MO American St Louis St Charles Counties'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 MO American St Louis St Charles Counties. Its phone number on EPA record is 314-548-0199. Its mailing address on EPA record is 901 HOG HOLLOW RD, CHESTERFIELD, MO 63017-0000. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.