Asbestos above the legal limit in the period starting January 2026.
Serves about 3,940 people (2,429 connections) with surface water from its own intake.
From EPA's record for OK1011401. PurityMap is independent of Frederick.
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15 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From January 2026 | Asbestos | 106 MFL | 7 MFL | Archived |
| From October 2025 | Asbestos | 105 MFL | 7 MFL | Archived |
| From July 2025 | Asbestos | 80 MFL | 7 MFL | Archived |
| From October 2024 | Lead and copper rule revisions | – | – | Resolved |
| Apr–Jun 2024 | Total trihalomethanes (TTHM) | 0.086 mg/L | 0.080 mg/L | Archived |
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Oct–Dec 2023 | Total trihalomethanes (TTHM) | 0.089 mg/L | 0.080 mg/L | Archived |
| From July 2023 | Carbon, total | 0.95 RATIO | TT | Archived |
| Jul–Sep 2023 | Total trihalomethanes (TTHM) | 0.096 mg/L | 0.080 mg/L | Archived |
| From April 2023 | Carbon, total | 0.92 RATIO | TT | Archived |
| From January 2023 | Carbon, total | 0.9 RATIO | TT | Archived |
| Apr–Jun 2018 | Total trihalomethanes (TTHM) | 0.105 mg/L | 0.080 mg/L | Resolved |
| Jan–Mar 2018 | Total trihalomethanes (TTHM) | 0.108 mg/L | 0.080 mg/L | Resolved |
| From January 2018 | Chlorite | 1.3 mg/L | 1.0 mg/L | Resolved |
| Oct–Dec 2017 | Total trihalomethanes (TTHM) | 0.109 mg/L | 0.080 mg/L | Resolved |
| Jul–Sep 2017 | Total trihalomethanes (TTHM) | 0.097 mg/L | 0.080 mg/L | Resolved |
EPA required this system to test for 30 unregulated and emerging contaminants, from March 2023 to December 2023.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorohexanesulfonic acid (PFHxS) | 3 ng/L | 10 ng/L federal MCL (2024) | Within a historical reference; current applicability unverified | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| Perfluorobutanoic acid (PFBA) | 12.5 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| 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 | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| 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 | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| 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 | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| 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 | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| 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 | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| 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 | 2023-03-14 to 2023-12-04 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-26 to 2023-12-04 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-26 to 2023-12-04 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| 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 | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-26 to 2023-12-04 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-26 to 2023-12-04 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-08-14 to 2023-12-18 | UCMR5 Analytical Results: FREDERICK (OK1011401) |
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.
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Follow this water →Frederick's phone number on EPA record is 580-335-7551. Its mailing address is The Honorable Kevin Ouellette, Mayor, P.O. BOX 399, FREDERICK, OK 73542.
According to EPA's record, Frederick uses surface water from its own intake.
EPA's record shows 15 health-based violations for Frederick in the 10 years to July 9, 2026. Asbestos was above the legal limit in the period starting January 2026. EPA also lists 1 missed or late test or report in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Frederick's latest lead and copper round, which ended in December 2024, was 1.8 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Frederick. Its phone number on EPA record is 580-335-7551. Its mailing address on EPA record is The Honorable Kevin Ouellette, Mayor, P.O. BOX 399, FREDERICK, OK 73542. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.