Caldwell
Is Caldwell tap water safe to drink?
Mostly yes — Caldwell scores 81/100. This report aggregates EPA drinking water data across 2 local systems in Caldwell. We found 604 total violations (293 unresolved).
Real-Time Environment
Live: 04:15 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Caldwell.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Caldwell?
Expert Advice
Given the safety margin, a Carbon Block or sediment filter is recommended to improve taste and remove trace particulates.
Buying a Filter?
Should you buy a water purifier in Caldwell? See our analysis.
Baby Formula Safety
Is Caldwell tap water safe for infants? Critical safety guide.
Homebuyer's Perspective
For those looking to relocate to Caldwell, water quality is a key factor in long-term property maintenance. The high safety score (81/100) suggests lower risk for plumbing corrosion and appliance scaling.
Health & Family Safety
Residents should monitor Lead (90th percentile) levels. Pregnant women and families with young children should consult the specific EPA health goals listed below.
View Health Risk Glossary →Compliance Record for Caldwell
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Caldwell.
Frequently Asked Questions
Is Caldwell tap water safe to drink?
Mostly yes — Caldwell scores 81/100.
How many water systems serve Caldwell?
Caldwell is served by 2 public water systems in our latest EPA-backed dataset.
How can I check water quality for my exact address in Caldwell?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Caldwell.
What is the water quality score for Caldwell?
The water quality score for Caldwell is 81 out of 100, based on EPA contaminant data, violation history, and testing results across the 2 systems serving the city.
What are the top contaminants in Caldwell?
The top contaminants detected in Caldwell include Lead (90th percentile). View detailed information on our contaminants page.
Caldwell Water Quality Summary
Caldwell, ID receives a water quality score of 81/100 (Grade B) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 2 public water systems serving the area.
Caldwell's water quality is above the national average, with strong compliance records and low contaminant levels. Residents generally receive clean, safe tap water that meets EPA standards.
Caldwell's score of 81 is 1 point above the Idaho state average of 80, and above the nationwide average of roughly 78/100 across all U.S. states.
Nestled within the agricultural valleys of the Mountain West, Caldwell's water is supplied by a couple of distribution networks serving this mid-size Idaho city. Prospective homebuyers and current residents will find the local tap water is of generally good quality, indicating a reliable system with only minor areas for improvement. Because the local watershed is situated among forested mountains and active farming lands, the water quality is typical of the region and remains well-suited for daily residential needs.
Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our Idaho water quality rankings report →
Key Contaminants
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Water Systems Serving Caldwell (2)
Check Your Specific Address
Water quality can vary by neighborhood in Caldwell.
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