Is Southold (T), New York tap water safe?
3 water systems report serving Southold (T). Your water depends on which one serves your address. Check your bill if unsure.
C
Suffolk County Water Authority
Serves 1,100,000 people · Groundwater · Full report →
No health-based violations in the last 5 years; PFOA/PFOS average above the 4 ppt federal limit: PFOS, PFOA; Other PFAS above 2024 limits (rule proposed for repeal): Hazard Index; Lead 90th percentile below the action level (2025).
A
Greenport Water District
Serves 2,050 people · Groundwater · Full report →
No health-based violations in the last 5 years; 1 monitoring/reporting violation; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2024).
A
Fishers Island Water Works
Serves 380 people · Surface water · Full report →
No health-based violations in the last 5 years; 4 monitoring/reporting violations; 1 not yet resolved; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2023).