California’s Plan to Harvest Rain & Stormwater

A well-designed, installed and maintained rainwater harvesting system can provide significant amounts of high-quality water. Given an average 12 inches of annual Southern California precipitation, a 1,500-square-foot residential roof could collect over 10,000 gallons annually; and for a 100,000 ft2 commercial building, the quantity is over 700,000 gallons.

Nitrate in well water: What is it, and what do you do? – NGWA

Nitrates are nitrogen-oxygen compounds that serve as essential nutrients for plants, which absorb them from the soil. The largest source of nitrates are fertilizers used on crops. Animal and human waste also contains nitrogen in the form of ammonia.