Water Conservation Rebate Tax Parity Act This bill expands the tax exclusions for energy conservation subsidies to include subsidies provided (directly or indirectly) (1) by a public utility for the purchase or installation of any water conservation or efficiency measure; (2) by a storm water management provider for the purchase or installation of any storm water management measure; or (3) by a state or local government to a resident of such state or locality for the purchase or installation of any wastewater management measure, but only if such measure concerns the taxpayer's principal residence.