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Water utility · serves Suffolk County · New York

Suffolk County Water Authority

No open EPA violations as of 2026-09-16.

EPA record checked 2026-10-06

Contact and official links

Contact Suffolk County Water Authority

From EPA's record for NY5110526. PurityMap is independent of Suffolk County Water Authority.

Mailing address
P.O. Box 18043
HAUPPAUGE, NY 11788
Directions ↗
Phone and website631-563-0258

Pay your bill, start or stop service on scwa.com.

Annual water quality reportNot in our sources yet

Every community water system publishes one each year. Your water bill or the utility's website links to it.

Where it delivers water

As listed in EPA's records. Your water bill names your supplier.

Are you this utility? Correct this listing →

Test results

No result on record is above a federal legal limit

31 results are on record. These 5 come first: results above a listed reference, then those closest to a legal limit.

All 31 results and evidence →
  • Perfluorooctanesulfonic acid (PFOS)Above a historical reference; current applicability unverified
    4 ng/L federal MCL
    17.4ng/L
  • Perfluorooctanoic acid (PFOA)Above a historical reference; current applicability unverified
    4 ng/L federal MCL
    6.5ng/L
  • Perfluorohexanesulfonic acid (PFHxS)Above a historical reference; current applicability unverified
    10 ng/L federal MCL
    10.8ng/L
  • Perfluorononanoic acid (PFNA)Within a historical reference; current applicability unverified
    10 ng/L federal MCL
    5.7ng/L
  • Lead (90th percentile)Below the listed reference
    15 µg/L action level
    1.25µg/L
EPA violations and monitoring

1health-based violation in the last 10 years · none open as of 2026-09-16

  • AsbestosExceeded the federal Asbestos limit (7 MFL); measured 26.62 MFL, 2020 (Resolved).

From EPA SDWIS. Counted once per contaminant per year in the Track record subject score. A violation record is a compliance fact, not a health verdict.

Sources behind this page
  • UCMR5 Analytical Results: SUFFOLK COUNTY WATER AUTHORITY (NY5110526)US EPA · published 2026-01-15
    View ↗
  • Lead & Copper Rule 90th-percentile: SUFFOLK COUNTY WATER AUTHORITY (NY5110526)US EPA SDWIS · published 2026-07-09
    View ↗
  • EPA SDWIS Violations & Enforcement: SUFFOLK COUNTY WATER AUTHORITY (NY5110526)US EPA SDWIS · published 2026-07-09
    View ↗
Commercial · test your own tap

The system record stops at your property line

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 DIY Lead in Drinking Water Combo Test Kit

    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.

Questions

About Suffolk County Water Authority

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How do I contact Suffolk County Water Authority?

Its official website is scwa.com, its phone number on EPA record is 631-563-0258 and its mailing address is P.O. Box 18043, HAUPPAUGE, NY 11788. These details come from the system's EPA record and a check of its website.

How do I pay my Suffolk County Water Authority bill?

Bills, starting service and stopping service are handled by Suffolk County Water Authority on its official website, scwa.com. PurityMap does not take payments.

Which cities does Suffolk County Water Authority serve?

EPA's records list Suffolk County Water Authority as serving Suffolk County, New York. Your water bill names your supplier.

Has Suffolk County Water Authority tested for PFAS?

PurityMap's record for Suffolk County Water Authority holds results for 29 PFAS substances. 10 were detected, and none is above a federal legal limit. Each result links to its source in the city report.

Does Suffolk County Water Authority have any EPA violations?

No open EPA violations as of 2026-09-16: that is what EPA's record shows for Suffolk County Water Authority. The record comes from EPA's SDWIS compliance database.

Where does Suffolk County Water Authority get its water?

Suffolk County Water Authority is on EPA record as drawing from groundwater.