Northern Mariana Islands
Water quality data from the EPA Safe Drinking Water Information System
Lead Risk: Caution
Water Systems
223
Active public water systems
Population Served
70.2K
Residents with piped water
Lead Violations
7
Systems exceeding 15 ppb
Copper Violations
3
Lead & Copper Rule
Average Lead Level
4.16 ppb
EPA Action Level: 15 ppb
MCLG (health goal): 0 ppb
0 ppbAction Level: 15 ppb
Average across 70 systems with reported lead data.
Violations Detected
10 water systems in Northern Mariana Islands have reported violations under the Lead and Copper Rule. These utilities are required to notify customers and take corrective action.
7 lead violations3 copper violations
Water Systems: Highest Lead Levels
| System Name | City | Population | Lead Level | Status | Sample Date |
|---|---|---|---|---|---|
| Saipan | 48,524 | 2.50 ppb | OK | 2025-12-31 |
Showing top 1 of 70 systems with lead data. Action level: 15 ppb.
Water Source Types
Groundwater152 (68%)
Purchased Groundwater54 (24%)
Unknown9 (4%)
Surface Water7 (3%)
Purchased GW Under Influence of SW1 (0%)
Data source:EPA Safe Drinking Water Information System (SDWIS), Lead and Copper Rule monitoring data. Lead levels represent 90th percentile results from the most recent monitoring period. Violations indicate exceedances of EPA action levels requiring corrective action. This tool is for informational purposes only and does not replace your utility's official Consumer Confidence Report.