Relative pollutant reduction from sand filter systems for metals, nitrogen, bacteria, and organics.
Link to this table

Pollutant Constituent Treatment capabilities1
Metals2 Cadmium, Chromium, Copper, Zinc, Iron, Nickel, Lead Medium/High3
Nitrogen Total nitrogen Low/medium
Total Kjeldahl nitrogen Medium
Bacteria Fecal coliform, e. coli Medium
Organics Medium/High4

1 Low: < 30%; Medium: 30 to 65%; High: >65%
2 Results are for total metals only
3 Treatment capabilities for Cd and Cr are based on results of a single study by Kurz, 1998. This study shows low (9.3%) removal rates for Cr.
4 High if amended with clay or organic matter

This page was last edited on 4 August 2022, at 16:22.