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Stormwater runoff is the water that flows off City sidewalks, streets, and other hard surfaces during rainstorms. The runoff is collected in ditches, culverts, catch basins, and storm sewers.
In areas with natural ground cover, only 10% of rainwater becomes runoff. The rest is absorbed or evaporates. In urban areas, up to 55% of rainfall can become storm water runoff.
A storm drain maintenance program is required to ensure that ditches, culverts, catch basins, and storm sewers are kept clean of sand, silt, and other debris that may plug the system.
To report a suspected illicit discharge in Sunnyside, call (509) 837-5206.
To learn more about stormwater check out the Regional Stormwater Management Program.
If you would like to make comments on the City's Stormwater Management Program Plan please email us at _CityStormwater@sunnyside-wa.gov.