[Arms67] procedure is used for the analysis of nitrate and nitrite. For nitrate analysis ... All the reagent solutions, primary and secondary standards are made with fresh distilled deionized water ...

ROCHESTER, Minn. — Nitrates in water is still the hottest issue facing southeast Minnesota's agricultural industry. Aune Hall on the Olmsted County fairgrounds reached capacity March 13 ...

Citizen scientists in Iowa are monitoring nitrate levels in streams and drinking water through the Izaak Walton League's Nitrate Watch program. The data collected supplements state monitoring ...

And many are pumping out water that’s high in nitrate, the state testing shows. Some 40% of private wells tested in the past ...