1 open health-based violation on EPA record.
Serves about 4,183 people (1,789 connections) with surface water bought from Okla Ordnance Works Authority.
From EPA's record for OK3004617. PurityMap is independent of Mayes Co RWD #4.
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1 health-based violation in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From October 2024 | Lead and copper rule revisions | – | – | Addressed |
EPA required this system to test for 30 unregulated and emerging contaminants, from April 2025 to September 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorobutanoic acid (PFBA) | 17 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| 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 | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| 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 | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| 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 | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| 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 | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| 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 | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| 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 | 2025-04-15 to 2025-09-16 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-09-16 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-09-16 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| 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 | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-09-16 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-09-16 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-09-09 to 2025-09-23 | UCMR5 Analytical Results: MAYES CO RWD #4 (OK3004617) |
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 →Mayes Co RWD #4's phone number on EPA record is 918-825-4661. Its mailing address is Jacob Lloyd, 5781 West 480 Road, PRYOR, OK 74361.
According to EPA's record, Mayes Co RWD #4 uses surface water bought from Okla Ordnance Works Authority.
EPA's record shows 1 health-based violation for Mayes Co RWD #4 in the 10 years to July 9, 2026. EPA's record lists 1 open health-based violation. EPA also lists 5 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
Lead was not detected at the 90th percentile of tap samples in Mayes Co RWD #4's latest lead and copper round, which ended in June 2026. The federal action level is 15 µg/L.
PurityMap has no verified website for Mayes Co RWD #4. Its phone number on EPA record is 918-825-4661. Its mailing address on EPA record is Jacob Lloyd, 5781 West 480 Road, PRYOR, OK 74361. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.