Multnomah Water Quality Report
6 cities ranked · Average grade: C+ · Oregon
Avg Score
65
Cities Ranked
6
Health Violations
5
PFAS Detected
0
65
County avg score
6
Cities ranked
50%
A or B grade
33%
D or F grade
5
Health violations
0
PFAS detected
Grade Distribution
How Multnomah cities scored
A
1
17%
Excellent
B
2
33%
Good
C
1
17%
Fair
D
1
17%
Poor
F
1
17%
Failing
Comparison
County vs Oregon average
▲ 2.7 pts above state average
City Map
Water quality across Multnomah
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Multnomah
Worst cities
County context
4
Superfund sites in Multnomah
0.0%
of residents on fluoridated water (CDC, 2020)
393,377
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Multnomah
Industrial polluters nearby
Facilities reporting the most surface-water releases in Multnomah, 2023.
Total reported releases to surface water: 393,377 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
SILTRONIC CORP PORTLAND, OR97210 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 388,619 |
VIGOR INDUSTRIAL PORTLAND, OR97217 | Xylene (mixed isomers) | 4,442 |
EVRAZ PORTLAND PORTLAND, OR97203 | Manganese compounds | 137 |
EAST SIDE PLATING INC PLANTS 1-3 PORTLAND, OR97202 | Zinc compounds | 65 |
BOEING CO OF PORTLAND PORTLAND, OR97230 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 62 |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in Multnomah
Superfund sites nearby
Federally tracked hazardous-waste sites within Multnomah on the EPA National Priorities List.
- BRADFORD ISLAND
- MCCORMICK BAXTER CREOSOTING CO PORTLAND PLANT
- PORTLAND HARBOR
- REYNOLDS METALS COMPANY
Source: EPA Superfund National Priorities List
Full Rankings
All 6 cities in Multnomah
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Troutdale | A- | 88.5 | 16K | 50 | Health Unresolved | |
| 2 | Wood Village | B | 80 | 4K | 116 | Health Unresolved | |
| 3 | Gresham | B | 75.2 | 77K | 69 | Unresolved | |
| 4 | Corbett | C- | 57.3 | 3K | 201 | Health Unresolved | |
| 5 | Fairview | D | 49.5 | 11K | 301 | Health Unresolved | |
| 6 | Portland | F | 39.4 | 752K | 2021 | Health Unresolved |