No open health-based violations on EPA record in the last 10 years; latest legal-limit breach in the period starting April 2025.
Serves about 400 people (433 connections) with surface water bought from Ketchum PWA Delaware Co System.
From EPA's record for OK3002138. PurityMap is independent of Delaware Co RWD # 7.
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9 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Apr–Jun 2025 | Haloacetic acids (HAA5) | 0.063 mg/L | 0.060 mg/L | Resolved |
| Jan–Mar 2025 | Haloacetic acids (HAA5) | 0.074 mg/L | 0.060 mg/L | Resolved |
| Oct–Dec 2024 | Haloacetic acids (HAA5) | 0.072 mg/L | 0.060 mg/L | Resolved |
| Jul–Sep 2024 | Haloacetic acids (HAA5) | 0.068 mg/L | 0.060 mg/L | Resolved |
| Jul–Sep 2017 | Haloacetic acids (HAA5) | 0.073 mg/L | 0.060 mg/L | Resolved |
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Apr–Jun 2017 | Haloacetic acids (HAA5) | 0.082 mg/L | 0.060 mg/L | Resolved |
| Jan–Mar 2017 | Total trihalomethanes (TTHM) | 0.083 mg/L | 0.080 mg/L | Resolved |
| Jan–Mar 2017 | Haloacetic acids (HAA5) | 0.099 mg/L | 0.060 mg/L | Resolved |
| Oct–Dec 2016 | Haloacetic acids (HAA5) | 0.091 mg/L | 0.060 mg/L | Resolved |
EPA required this system to test for 30 unregulated and emerging contaminants, from January 2025 to October 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 | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| 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 | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| 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 | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| 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 | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| 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 | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| 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 | 2025-01-14 to 2025-10-13 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| 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 | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-14 to 2025-09-22 | UCMR5 Analytical Results: DELAWARE CO RWD # 7 (OK3002138) |
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 →Delaware Co RWD # 7's phone number on EPA record is 918-256-4656. Its mailing address is Ms. Jo Adams, Chairwoman, 453539 Lakeview Terrace, AFTON, OK 74331.
According to EPA's record, Delaware Co RWD # 7 uses surface water bought from Ketchum PWA Delaware Co System.
EPA's record shows 9 health-based violations for Delaware Co RWD # 7 in the 10 years to July 9, 2026. No open health-based violations on EPA record in the last 10 years. The latest legal-limit breach on record was in the period starting April 2025. 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 Delaware Co RWD # 7's latest lead and copper round, which ended in December 2023. The federal action level is 15 µg/L.
PurityMap has no verified website for Delaware Co RWD # 7. Its phone number on EPA record is 918-256-4656. Its mailing address on EPA record is Ms. Jo Adams, Chairwoman, 453539 Lakeview Terrace, AFTON, OK 74331. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.