Relative pollutant reduction from sand filter systems for metals, nitrogen, bacteria, and organics.
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Pollutant Constituent Treatment capabilities1
Metals2 Cadmium, Chromium, Copper, Zinc, Iron, Nickel, Lead Medium/High
Nitrogen2 Total nitrogen Low/medium
Total Kjeldahl nitrogen Medium
Bacteria2 Fecal coliform, e. coli Medium
Organics High

1 Low: < 30%; Medium: 30 to 65%; High: >65%
2 International Stormwater Database, (2012)
3 LeFevre et al., (2012)
4 Hsieh and Davis (2005).