This document outlines the learning outcomes for the environmental chemistry section of the Leaving Certificate Chemistry curriculum in Ireland. It covers four topics: 1) the pH scale, 2) hardness in water, 3) water treatment, and 4) water analysis. The key points covered include defining pH and calculating pH of solutions, identifying causes of water hardness and methods for removal, describing water treatment processes like sedimentation and chlorination, and outlining instrumental methods for water analysis including pH meters, atomic absorption spectroscopy, and colorimetry.