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Scientific Investigations Report 2012–5068


Reconnaissance of Contaminants in Selected Wastewater-Treatment-Plant Effluent and Stormwater Runoff Entering the Columbia River, Columbia River Basin, Washington and Oregon, 2008–10


Table 1. Precipitation, population, age, and income information for cities where samples were collected, Columbia River Basin, Washington and Oregon.


[Data from U.S. Census Bureau (2010). Symbols: <, less than; >, greater than]


City State County Average

annual

precipitation

(inches)
Population Population density
(people per 
square mile)
Population age
distribution

(percent)
Median age

(years)
Median annual

household income

(U.S. dollars)
Average
household size
(persons)
< 18 years 18–65 years > 65 years
Wenatchee Washington Chelan 9 31,925 4,110 25 61 14 36.4 $42,600 2.55
Richland Washington Benton 7 48,058 1,350 25 62 13 38.4 $62,200 2.53
Umatilla Oregon Umatilla 8 6,906 1,560 23 73 4 31.5 $46,800 3.08
The Dalles Oregon Wasco 14 13,620 2,150 25 57 18 39.3 $44,100 2.40
Hood River Oregon Hood River 32 7,167 2,810 28 58 14 34.9 $47,200 2.43
Portland Oregon Multnomah 37 583,776 4,380 20 70 10 35.5 $48,100 2.27
Vancouver Washington Clark 42 161,791 3,480 24 64 12 35.6 $48,000 2.46
St. Helens Oregon Columbia 46 12,883 2,840 28 64 8 33.3 $53,500 2.74
Longview Washington Cowlitz 48 36,648 2,530 24 60 16 39.1 $39,000 2.32

First posted April 25, 2012

For additional information contact:
Director, Oregon Water Science Center
U.S. Geological Survey
2130 SW 5th Avenue
Portland, Oregon 97201
http://or.water.usgs.gov

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