HARTLAND (AP) — Seven Maine wastewater facilities are receiving $29.7 million for upgrades.

The in U.S. Department of Agriculture Rural Development grants were announced Tuesday in Hartland in an event celebrating Earth Day. Nationally, a total $387 million is going to 116 similar projects in 40 states and Puerto Rico.

In Maine, the funds are being used for upgrades to wastewater systems the USDA says will help prevent contamination of the state’s waterways.

USDA Rural Development says it invested $462.5 million in rural Maine communities last fiscal year. Those funds went to projects that improve the economic stability of rural communities.

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