Food and Water Watch, Patuxent Riverkeeper, and Potomac Riverkeeper issued a notice of intent to sue January 24 asserting that three NRG Energy coal-fired power plants in Maryland continue to violate nitrogen and phosphorus discharge limits in their Clean Water Act permits. The groups gave NRG a 60-day notice to comply or else face a lawsuit that would demand penalties of up to $37,500 a day for noncompliance with the National Pollutant Discharge Elimination System permit.