National Association of Clean Water Agencies
- Native Plants
Plants which occurred in an area before disturbance by humans.
- Natural Filter
A grassed, wooded or vegetative strip that acts as a filter for the runoff before the water enters a stream.
- Non-Capacity-Related SSO
Also known as a Dry Weather Overflow.
- Non-point Source Pollution
Pollution which does not enter the water from any discernible, confined and discrete conveyance source but rather wash off, run off or seep from broad areas of land.