The Pennsylvania Department of Environmental Protection on Monday granted Pittsburgh and 79 municipalities an 18-month deadline extension to come up with a plan to reduce stormwater flowing into the sewer system, but the leeway came with conditions.

DEP officials told them that “green” infrastructure such as rain barrels, green roofs, rain gardens and permeable pavement must be part of their plans.

“We’re really excited to see the DEP taking a positive approach to green infrastructure and making it a requirement to the extension,” said Jennifer Kennedy, director of the Clean Rivers Campaign.

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