| Answer | Crossword Clue |
|---|---|
| REDTIDES | Water conditions toxic to shellfish |
| sanitation | Conditions relating to public health, esp. the provision of clean drinking water and adequate sewage disposal |
| sanitary | Of or relating to the conditions that affect hygiene and health, esp. the supply of sewage facilities and clean drinking water |
| grade | (of a stream bed) so adjusted to conditions of slope and the volume and speed of water that no gain or loss of sediment takes place |
| specific | Of or denoting a number equal to the ratio of the value of some property of a given substance to the value of the same property of some other substance used as a reference, such as water, or of a vacuum, under equivalent conditions |
