No health-based violations on EPA record since 2016.
Serves about 5,633 people (2,402 connections) with groundwater from its own wells, and buys water from Corning Waterworks.
From EPA's record for AR0000722. PurityMap is independent of Clay Co Reg Water District.
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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 May 2024 to November 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 73.6 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 | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| 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 | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| 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 | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| 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 | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| 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 | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| 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 | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| 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 | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-13 to 2024-11-25 | UCMR5 Analytical Results: CLAY CO REG WATER DISTRICT (AR0000722) |
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 →Clay Co Reg Water District's phone number on EPA record is 870-259-3327. Its mailing address is P O BOX 10, MC DOUGAL, AR 72441-0000.
According to EPA's record, Clay Co Reg Water District uses groundwater from its own wells, and buys water from Corning Waterworks.
No health-based violations on EPA record since 2016. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Clay Co Reg Water District's latest lead and copper round, which ended in December 2025, was 1 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Clay Co Reg Water District. Its phone number on EPA record is 870-259-3327. Its mailing address on EPA record is P O BOX 10, MC DOUGAL, AR 72441-0000. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.