γ rays have been detected from 230-MeV negative pions incident on a water target. De-excitation γ rays from 10B, 12C, 13C, 14C, 14N, 15N, 15O, 16O, and 16N have been identified and cross sections for excitation of particular residual states determined. Where necessary, the cross sections have been corrected for γ feeding from higher states. Decays from short lived nuclear states result in Doppler broadened peaks which yield nuclear recoil momenta. NUCLEAR REACTIONS 16O(π-, γX), E=230 MeV, measured relative γ yields at θ=90°.