LOCATION |
CLICK ON IMAGE FOR HIGH RES. |
| Humbolt 42.73N, 94.22W |  |
| Ames (2 Samples) 42.03N, 93.62W |  |
| Onion Creeek, Boone 42.00N, 93.90W |  |
| Peas Creek/Des Moines River, 42.00N, 93.88W |  |
| Muscatine (3 Samples) 41.42N, 91.06W |  |