| Home |
| Introduction |
| Hypothesis |
| Methodology |
| Data & Analysis |
| Prototype Filter Test |
| Raw Numerical Data |
| Conclusion |
| Credits |
| Learn More |
 EWEB Lab |
 Conductivity meter |
 Pre & post filtered sample |
Data & Analysis
Numerical Results
| Sample | pH | Turbitidy NTU | Conductivity µSiemens | Hardness ppm CaCO3 | TSS ppm | Coliform CFU/mL |
| Metal Roof | 5.97 | 1.3 | 12.4 | 0.5 | 3 | 100 |
| Plumbing | 6.89 | 0.5 | 17.1 | 6 | 6 | >500 |
| Cistern | 8.91 | 2.4 | 735 | 10 | 9 | 3 |
| Tap Water | 7.32 | 0.3 | 77.1 | 24 | 2 | 0 |
| Shingle Roof | 5.94 | 8.3 | 455 | 41 | 6 | >500 |
| EWEB Range | 7.5-7.8 | 0.02-0.04 | 45-65 | 18-25 | <0.5 | 0 |
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Rainwater Harvesting is a Vital Signs Case Study
prepared by Angela Matt and
Joshua Cohen, Spring 2001.