GRANDVIEW - Grandview's water meets or surpasses all state and federal drinking water standards, according to the Grandview Public Works Department.
In a mailing to Grandview residents this week, the office of public works details the water situation of the city, explaining technical terms and giving information about what can be found in Grandview's water supply.
Some highlights of the report include a map showing the location of the geological formation the city's wells tap into. The Columbia River Basalt Group extends through most of southeast Washington and northern Oregon along the Columbia River, and contains the four hydro-geologic units the city wells use. Those four basalt units, Grande Ronde, Wanapum, Saddle Mountain and Overburden, contain the water the city uses.
The report also includes information on the percentage of contaminants drinking water is allowed to legally have, as established by the Environmental Protection Agency.
The mailing also includes an explanation of cross-connections and why water customers need to protect the system from backflow. The city has a program in place to help prevent contamination from backflow at cross-connections.
In several illustrated tables, the office touts its success in keeping Grandview's water clean. In the case of coliform bacteria, the city hit the goal of no bacterial colonies detected in the water.
The mailing also gives information on how to get water tested for people worried about the possibility of lead in their drinking water.