EWEB Lab

Conductivity meter

Pre & post filtered sample

Data & Analysis
Part 2 - Prototype filter sample analysis

These samples are not directly comparable to the ones tested in our baseline investigations. This is because we combined all rainwater samples and added organic matter (dirt, leaves, and twigs) to simulate a "first flush". However, it is interesting to note that our filter effluent was in the same range as EWEB's finished water, indicating the prototype was very effective in removing suspended solids.

In addition to (or perhaps as a result of) suspended particle removal, our prototype filter also removed all traces of color in the sample pictured above.

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Rainwater Harvesting is a Vital Signs Case Study
prepared by Angela Matt and Joshua Cohen, Spring 2001.