Nitrates are a product of sewage breakdown. In Canada, the safe limit set for nitrates in drinking water is 10mg/L. Savary Shores well-1 water had been in a stable range of 3.25-3.66 mg/L for 15 years, and the younger well-2 had been a stable range of 1.95-2.01 mg/L for 2 years. In 2017, both readings jumped. To monitor the situation, SSID's Water Sampler started taking nitrates tests monthly. After the nitrates levels had shown no spikes for a year, the Water Sampler started testing quarterly. This Nitrates Table shows data 2009 - April 2020. See also the Nitrate Fact Sheet.pdf at bottom of this page.