Idaho
Water Quality Report
80 Good
Average Score
80/100
Water Systems
126
Population
1.5M
Violations
203 103 unresolved
Score Distribution
29 A
7 B
1 C
0 D
5 F
Lowest Scoring Water Systems
0
Capitol Water Corp F
ID4010022 Boise, ID 9,000 served
0
Super Pumper/Sinclair #5 F
WY5600298 Idaho Falls, ID 1,022 served
0
Falls Water Company Inc F
ID7100030 Idaho Falls, ID 22,650 served
0
Rexburg City Of F
ID7330022 Rexburg, ID 40,695 served
20
Lewiston City Of F
ID2350014 Lewiston, ID 15,001 served
Counties in Idaho
Cities in Idaho
View all 91 cities →Popular City Comparisons in Idaho
Quickly compare major cities in Idaho by water quality score and grade.
Frequently Asked Questions
Is tap water in Idaho safe to drink?
Idaho has an average WaterQ score of 80/100 across 126 public water systems. Safety can vary by city and system, so check your local report for recent violations and contaminants.
How many water systems are in Idaho?
WaterQ currently tracks 126 public water systems in Idaho.
Where can I compare cities in Idaho?
Use the city list below to open detailed reports, or visit the compare tool to benchmark two cities side-by-side on score, grade, and system coverage.