Portland
Multnomah County, Oregon
99 Excellent
Water Quality Score
99/100
Grade
A
Water Systems
2
Population
652,503
Key Contaminants
Arsenic
9.1109 / 10 μg/L
0 μg/L MCL: 10 μg/L
Uranium
26.1253 / 30 μg/L
0 μg/L MCL: 30 μg/L
Selenium
41.4616 / 50 μg/L
0 μg/L MCL: 50 μg/L
Tetrachloroethylene (PCE)
3.408 / 5 μg/L
0 μg/L MCL: 5 μg/L
Fluoride
2.583 / 4 mg/L
0 mg/L MCL: 4 mg/L
Radium-228
2.6211 / 5 pCi/L
0 pCi/L MCL: 5 pCi/L
Chromium (Total)
10.2589 / 100 μg/L
0 μg/L MCL: 100 μg/L
Gross Alpha Particle Activity
0.1796 / 15 pCi/L
0 pCi/L MCL: 15 pCi/L
Water Systems Serving Portland (2)
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