No open EPA violations as of 2026-09-16.
EPA record checked 2026-10-06
From EPA's record for WA5340650. PurityMap is independent of Highline Water District.
Your water bill lists the utility's phone number and website.
Every community water system publishes one each year. Your water bill or the utility's website links to it.
Are you this utility? Correct this listing →
31 results are on record. These 5 come first, closest to a legal limit first.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lead (90th percentile) | 1.4 µg/L | 15 µg/L federal action level | Below the listed reference | 2023–2025 monitoring period | Lead & Copper Rule 90th-percentile: HIGHLINE WATER DISTRICT (WA5340650) |
| 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 | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| 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 | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| 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 | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| 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 | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| 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 | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| 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 | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| 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 | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-19 to 2025-05-05 | UCMR5 Analytical Results: HIGHLINE WATER DISTRICT (WA5340650) |
0health-based violations in the last 10 years · none open as of 2026-09-16
From EPA SDWIS. A clean violation history means no enforcement action was recorded; it does not cover contaminants without a limit. Meeting a federal limit is a compliance fact, not a health clearance.
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure
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.
Tested your own tap? Read your results →
One email when a new sampling round is published or a result moves across its reference.
Follow this water →Its mailing address is 23828 30th Ave S, Kent, WA 98032. These details come from the system's EPA record.
PurityMap has no verified website for Highline Water District. Its mailing address on EPA record is 23828 30th Ave S, Kent, WA 98032. Your water bill lists the ways to pay. PurityMap does not take payments.
EPA's records list Highline Water District as serving SeaTac, Washington. Your water bill names your supplier.
PurityMap's record for Highline Water District holds results for 29 PFAS substances. None was detected, and none is above a federal legal limit. Each result links to its source in the city report.
No open EPA violations as of 2026-09-16: that is what EPA's record shows for Highline Water District. The record comes from EPA's SDWIS compliance database.
Highline Water District is on EPA record as drawing from surface water.
Start with the hot-or-cold tap check. Where Highline Water District reported something related, it's shown below.
Lead at Highline Water District: 1.4 µg/L (90th percentile, 2023–2025 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.