F0/100
CALDWELL CITY OF — Water Quality Report 2026
Serving 74,000 people · Idaho
Water Source
Groundwater
County
—
System ID
ID3140013
Violations
386
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2020.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About CALDWELL CITY OF
Is CALDWELL CITY OF water safe to drink?
CALDWELL CITY OF water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 386 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has CALDWELL CITY OF detected?
66 contaminants were tested in CALDWELL CITY OF's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does CALDWELL CITY OF have any EPA violations?
Yes, CALDWELL CITY OF has 386 EPA violation(s) on record, with the most recent in 2020. Violation types include MR, MON, MCL. 6 are health-based violations.
How many people does CALDWELL CITY OF serve?
CALDWELL CITY OF serves approximately 74,000 people, Idaho.
What type of water does CALDWELL CITY OF provide?
CALDWELL CITY OF sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is ID3140013.
How does CALDWELL CITY OF compare to other utilities in Idaho?
CALDWELL CITY OF scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Idaho state page for a full comparison of water systems.