Canyon Water Quality Report
7 cities ranked · Average grade: C+ · Idaho
Avg Score
65.9
Cities Ranked
7
Health Violations
7
PFAS Detected
3
65.9
County avg score
7
Cities ranked
43%
A or B grade
43%
D or F grade
7
Health violations
3
PFAS detected
Grade Distribution
How Canyon cities scored
A
2
29%
Excellent
B
1
14%
Good
C
1
14%
Fair
D
1
14%
Poor
F
2
29%
Failing
Comparison
County vs Idaho average
▼ 2.3 pts below state average
City Map
Water quality across Canyon
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Canyon
Best cities
Worst cities
County context
3.7%
of residents on fluoridated water (CDC, 2020)
0
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Canyon
Industrial polluters nearby
Facilities reporting the most surface-water releases in Canyon, 2023.
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
ICCO MIDDELTON CALDWELL, ID83605 | — | — |
FORTERRA STRUCTURAL SPECIALTY PRODUCTS - CALDWELL CALDWELL, ID83607 | — | — |
SIMPLOT WESTERN STOCKMEN'S CALDWELL, ID83605 | — | — |
DARIGOLD-CALDWELL CALDWELL, ID83605 | — | — |
SIMPLOT U.S. FOOD GROUP HOLDINGS LLC CALDWELL, ID83605 | — | — |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Full Rankings
All 7 cities in Canyon
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Greenleaf | A | 92.9 | 846 | 44 | Health Unresolved | |
| 2 | Wilder | A | 91.3 | 4K | 31 | Health Unresolved | |
| 3 | Melba | B+ | 82.3 | 636 | 122 | Health Unresolved | |
| 4 | Notus | C | 62.9 | 1K | 312 | Health Unresolved | |
| 5 | Middleton | D+ | 51.6 | 14K | 310 | Health Unresolved | |
| 6 | Nampa | F | 41.8 | 105K | 2009 | Health Unresolved | |
| 7 | Caldwell | F | 38.5 | 78K | 1720 | Health Unresolved |