SUFFOLK COUNTY WATER AUTHORITY Water Quality Report
Population
1,100,000
people served
Water Source
🏔️ Ground
wells & aquifers
National Rank
Top 90%
of 49,184 US systems
5-Year Record
⚠️ 5
violations recorded
C
Fair
Safety Grade
5 violations in the past 5 years, including 3 health-based
System Details
- PWSID
- NY5110526
- Population Served
- 1,100,000
- Water Source
- Ground Water
- Owner
- Local Government
- State
- New York
- EPA Region
- 2
Contaminants of Concern
| Contaminant | Status | Violations |
|---|---|---|
| Contaminant 8000 | ⚠ Monitoring/Reporting | 2 |
| Contaminant 1032 | ✕ Health-Based | 1 |
| Contaminant 3000 | ⚠ Monitoring/Reporting | 2 |
| Contaminant 1094 | ✕ Health-Based | 2 |
| Contaminant 1066 | ⚠ Monitoring/Reporting | 3 |
| Mercury | ⚠ Monitoring/Reporting | 2 |
Violation History
2025
1
2024
1
2022
3
2020
2
2018
4
2017
1
Total violations on record: 12
Service Area
Cities Served
ZIP Codes Served
Recommended Water Filters
Based on contaminants detected in this water system:
Reverse Osmosis System
Removes up to 99% of contaminants including PFAS, lead, arsenic, and nitrates
Removes: Mercury
Water Distiller
Removes heavy metals, minerals, and most contaminants through evaporation
Removes: Mercury
How does this compare?
This systemNational average
Grade C
Avg: B-C
12violations total
43% of national average
National avg: ~28 per system
🏙️ This is a large system — serving 165× more people than the national average.