No health-based violations on EPA record since 2016.
Serves about 9,702 people (3,378 connections) with groundwater from its own wells, and buys water from City of Redmond and Sammamish Plateau Water & Sewer.
From EPA's record for WA5375265. PurityMap is independent of Ne Sammamish Sewer & 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 March 2025 to September 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 | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| 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 | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| 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 | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| 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 | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| 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 | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| 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 | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| 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 | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-17 to 2025-09-22 | UCMR5 Analytical Results: NE SAMMAMISH SEWER & WATER DISTRICT (WA5375265) |
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 →According to EPA's record, Ne Sammamish Sewer & Water District uses groundwater from its own wells, and buys water from City of Redmond and Sammamish Plateau Water & Sewer.
No health-based violations on EPA record since 2016. EPA also lists 1 missed or late test or report in 10 years. The record comes from EPA's SDWIS compliance database.
Lead was not detected at the 90th percentile of tap samples in Ne Sammamish Sewer & Water District'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 Ne Sammamish Sewer & Water District. Its mailing address on EPA record is 3600 SAHALEE WY NE, SAMMAMISH, WA 98074. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.