SAN SEBASTIAN Water Quality Report
Population
24,449
people served
Water Source
🌊 Surface
rivers, lakes, reservoirs
National Rank
Top 43%
of 49,184 US systems
5-Year Record
✅ Clean
no violations
A
Safe
Safety Grade
0 violations in the past 5 years, including 36 health-based
System Details
- PWSID
- PR0003303
- Population Served
- 24,449
- Water Source
- Surface Water
- Owner
- Local Government
- State
- Puerto Rico
- EPA Region
- 2
Contaminants of Concern
| Contaminant | Status | Violations |
|---|---|---|
| Contaminant 5000 | ⚠ Monitoring/Reporting | 5 |
| Contaminant 7000 | ⚠ Monitoring/Reporting | 5 |
| Total Trihalomethanes (TTHMs) | ✕ Health-Based | 12 |
| Haloacetic Acids (HAA5) | ✕ Health-Based | 22 |
| Contaminant 3100 | ✕ Health-Based | 2 |
| Contaminant 2036 | ⚠ Monitoring/Reporting | 2 |
| Contaminant 2046 | ⚠ Monitoring/Reporting | 2 |
| Contaminant 0100 | ⚠ Monitoring/Reporting | 14 |
| Contaminant 3015 | ⚠ Monitoring/Reporting | 14 |
| Total Coliform | ⚠ Monitoring/Reporting | 14 |
Violation History
2020
4
2018
20
2017
30
2016
8
2015
18
2014
9
2012
2
1992
1
Total violations on record: 92
Service Area
Cities Served
ZIP Codes Served
Recommended Water Filters
Based on contaminants detected in this water system:
Activated Carbon Filter
Effective for chlorine, THMs, pesticides, and taste/odor improvement
Removes: Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5)
UV Water Purifier
Kills bacteria and viruses without chemicals
Removes: Total Coliform
How does this compare?
This systemNational average
Grade A
Avg: B-C
92violations total
329% of national average
National avg: ~28 per system
📍 Mid-to-large system — serves 4× the national average.