Suffolk County has scheduled ground spraying for Wednesday and Thursday, with an eye to mosquito control, county health officials said.

Ground spraying using the pesticide Anvil is planned for Thursday from 6 to 10 p.m. for all streets in the Fire Island communities of Fire Island Pines, Summer Club, Atlantique and Water Island.

Also Thursday from 7 to 11 p.m., three South Shore communities in Brookhaven Town are to be sprayed with the pesticide Duet, health officials said. That will be in areas of Brookhaven hamlet, South Shirley and Mastic Beach.

As previously reported, ground spraying, also using Anvil, is scheduled for Wednesday from 6 to 10 p.m. for all streets in Ocean Bay Park, Seaview and Ocean Beach on Fire Island.

The chances of experiencing health effects from the ground spraying are “quite low,” the health department said, but children and pregnant women should avoid exposure if possible by staying clear of the area during spraying and at least 30 minutes after.

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Among the “common-sense steps” the department suggests are closing doors, windows and air-conditioning vents during spraying and 30 minutes after.

In addition to being annoying, some mosquitoes’ bites can transmit West Nile virus to people. This year, there is also a concern about Zika virus, which can be transmitted by a certain type of mosquito that has not been found on Long Island.

Health officials say residents can help make areas around their homes unfriendly to mosquitoes by:

  • Regularly looking for and eliminating even the smallest amounts of standing water, which is where the insects reproduce. That could include in cans, buckets and other containers, as well as old tires, tarps, pool covers and children’s toys.
  • Drilling drainage holes at the bottom of garbage cans, changing birdbath water at least weekly and making sure roof gutters are unclogged and draining properly.
  • Adding fish to circulate water in any backyard ponds, and clearing pond edges of debris and vegetation.