Population Served
20.3K
Service Connections
7.8K
Total Violations
213
Health-Based Violations
4
Lead & Copper Data
Lead Level
Safe1.00 ppb
Action Level: 15 ppb (EPA) · Sampled: 2025-12-31
015 ppb action level
Copper Level
No copper sampling data available
System Details
- Water Source
- Surface Water
- System Type
- Community Water System
- City
- NIWOT
- ZIP Code
- 80544
- Counties Served
- Boulder
- Cities Served
- Niwot
- Open Violations
- 0
- State
- Colorado
Violation Summary
213
Total Violations
4
Health-Based
0
Open Now
Most recent violation: 2017-11-01
Explore Colorado Water Quality
See all water systems, lead data, and violation trends for Colorado.
Data source: EPA ECHO SDWIS Bulk Download (Jan 2026). PWSID: CO0107471.SafeWater Home