Our Data, collected from various
sites along a stream behind Roland Park Country School in Baltimore, Maryland:
| # of Sample | pH Level | Aluminum Level | Clay Percentage | Sand Percentage | Silt Percentage |
| 1A | 5.4 | Very Low (1) | 18.90% | 78.40% | 2.70% |
| 2A | 7 | Very Low (1) | 25% | 70% | 5% |
| 3A | 5.3 | Very High (5) | 25% | 67.50% | 7.50% |
| 4A | 7.4 | Very Low (1) | 25% | 67.50% | 7.50% |
| 5A | 7.1 | Very Low (1) | 25% | 65% | 10% |
| 6A | 7.2 | Very High (5) | 33.30% | 63.30% | 3.30% |
| 7A | 7 | Very High (5) | 25% | 70% | 5% |
| 8A | 7 | Very Low (1) | 40% | 58% | 2% |
| 9A | 8.4 | Very High (5) | 25% | 70% | 5% |
| 10A | 7 | Very Low (1) | 20% | 78.75% | 1.25% |
| 11A | 7.4 | Very Low (1) | 45% | 53.75% | 1.25% |
| 12A | 6.5 | Very Low (1) | 45.00% | 50% | 5% |
| 13A | 6.3 | Very Low (1) | 28% | 68% | 4% |
| 14A | 6.5 | Very Low (1) | 23.30% | 73.30% | 3.30% |
| 15A | 5.5 | Low (2) | 50% | 47.50% | 2.50% |
| 16A | 5.4 | Very Low (1) | 28% | 64% | 8% |
| 17A | 5.5 | Low (2) | 20% | 68% | 12% |
| 18A | 6.6 | Very Low (1) | 80% | 10% | 10% |
| 19A | 5.2 | Very Low (1) | 50% | 45% | 5% |
| 20A | 6.3 | Very Low (1) | 36% | 56% | 8% |
| 1B | 5.4 | Very Low (1) | 15% | 80% | 5% |
| 2B | 6.3 | Low (2) | 44% | 48% | 8% |
| 3B | 4.8 | Very High (5) | 36.67% | 60% | 3.30% |
| 4B | 6.8 | Very Low (1) | 25% | 655% | 10% |
| 5B | 6.2 | High (4) | 30% | 66.60% | 3.30% |
| 6B | 7 | Very Low (1) | 40% | 56.60% | 3.30% |
| 7B | 7.4 | Very Low (1) | 36.60% | 61.60% | 1.60% |
| 8B | 7 | Very High (5) | 33.30% | 63.30% | 3.30% |
| 9B | 7.3 | Very High (5) | 32% | 66% | 2% |
| 10B | 7.1 | Very Low (1) | 4% | 94% | 2% |
| 11B | 5.2 | High (4) | 22.86% | 75.71% | 1.43% |
| 12B | 6.1 | Very High (5) | 25% | 70% | 5% |
| 13B | 5.5 | Low (2) | 63.30% | 3.30% | 33.30% |
| 14B | 4.4 | Very High (5) | 40% | 56.60% | 3.30% |
| 15B | 6.3 | Very High (5) | 41.43% | 57.14% | 1.43% |
| 16B | 6.3 | Very High (5) | 24% | 72% | 4% |
| 17B | 6.6 | Very High (5) | 66.60% | 30% | 3.30% |
| 18B | 5.4 | Very High (5) | 32% | 64% | 4% |
| 19B | 6 | Very High (5) | 36.60% | 60% | 3.37% |
| 20B | 5.2 | Very High (5) | 8% | 90% | 2% |