The Madera/Chowchilla Basin Study Unit was sampled between 4/14/2008 and 5/22/2008; 35 wells were sampled.
The study unit consists of 1 study area:
• Madera/Chowchilla study area (consists of: Madera and Chowchilla subbasins)
The study unit is within the Madera county and a small portion of Merced and Fresno counties.