![Man's hands holding a pH water test kit.](http://static.sciencelearn.org.nz/images/images/000/002/098/full/PSP_Aorere_ART_02_Restoring_mauri_pH_test.jpg?1674167622)
pH is a water quality indicator. Chemical spills and run-off can change stream pH, making it difficult for aquatic life to thrive.
pH is a water quality indicator. Chemical spills and run-off can change stream pH, making it difficult for aquatic life to thrive.