Spray Alerts

Ground & air spraying locations, dates, and times are listed below. Maps, if available, are also attached. In response to increased adult mosquito populations, or the detection of West Nile Virus, or the detection of invasive Aedes aegypti mosquitoes, the District is preparing to conduct adult and/or larval mosquito control operations in the following area(s):

Current Scheduled Spray Operations:

  • Ground spraying for adult mosquito control using  DeltaGard® and/or Evergreen 5-25, is scheduled for the morning of Thursday, August 7, 2025 between 3:30 a.m. and 5:30 a.m.
    • Portion of South Ripon: >North to Fourth St. >South the Stanislaus River >East to Stockton Ave. > West to S. Mohler Rd. See Map  COMPLETE
    • Rural East Escalon: >North to OID Canal, >South to Hwy 120, >East to Victory Ave., >West to Henry Rd. See Map COMPLETE
    • South Escalon: >North to Roosevelt Ave., >South to Catherine Way, > East to the RXR Tracks and St. John Rd., >West to McHenry Ave. See Map COMPLETE
    • Portion of Rural South County: See Map COMPLETE
  • Aerial spraying for adult mosquito control using Dibrom, is scheduled for the evening of Thursday, August 7, 2025, between 8:30 p.m. and 10:00 p.m. 
    • Rural East Ripon: >North to .6 mile south of Greenleaf Rd., >South to Stanislaus River, >East to Sexton Rd., >West to Wagner Rd. See Map 
    • Rural Delta Area: See Map
       
    Ground spraying for adult mosquito control using DeltaGard® and/or Evergreen 5-25, is scheduled for the morning of Friday, August 8, 2025 between 3:30 a.m. and 5:30 a.m.
    • Delta-West Terminous Tract: See Map
    • Portion of North Central Stockton: >North to Robinhood Dr., >South to E. March Ln., >East to Holiday Dr., >West to El Dorado St. See Map 



 

Past Completed Spray Operations:

  • Ground spraying for adult mosquito control using DeltaGard®, is scheduled for the morning of Wednesday, August 6, 2025 between 3:30 a.m. and 5:00 a.m.
    • Portion of North Stockton: >North to Bear Creek, >South to Wagner Heights, >East to Davis Rd., > West to Thornton Rd. See Map COMPLETE

  • Aerial spraying for adult mosquito control using Evergreen ULV 525 Air, is scheduled for the evening of Tuesday, August 5, 2025, between 8:15 p.m. and 10:30 p.m. 
    • Portions of Shima Tract, Rindge Tract, Wright Tract See Map COMPLETE
    • North Delta Area including portions of Canal Ranch Tract, Brack Tract, Terminous Track, and Staten Island. See Map COMPLETE

  • Aerial spraying for adult mosquito control using Dibrom, is scheduled for the evening of Wednesday, July 30, 2025, between 8:30 p.m. - 10:00 p.m. 
    • North Delta Area including portions of Canal Ranch Tract, Brack Tract, Terminous Track, and Staten Island. See Map  Canceled 
  • Ground spraying for adult mosquito control using DeltaGard® and/or Evergreen 5-25, is scheduled for the evening of Thursday, July 31, 2025 between 8:15 p.m. and 10:30 p.m.
    • Rural East Escalon: >North to OID Canal, >South to Hwy 120, >East to Victory Ave., >West to Henry Rd. See Map.  COMPLETE
    • Rural East Ripon: >North to .6 mile south of Greenleaf Rd., >South to Stanislaus River, >East to Sexton Rd., >West to Wagner Rd. See Map COMPLETE
    • West Roberts Island: See Map COMPLETE
  • Ground spraying for adult mosquito control using DeltaGard® and/or Evergreen 5-25, is scheduled for the morning of Friday, August 1, 2025 between 3:30 a.m. and 5:00 a.m.
    • Southwest Stockton Area: >North to Lloyd Thayer Cir., Carrie St., and Carolyn Weston Blvd., >South to William Moss Blvd., and Isni Goto St., >East to Manthey Rd., >West to Ews Woods Blvd., Isni Goto St., and Warmke Ln. See Map.  COMPLETE
    • A Portion of Southeast Tracy: >North to Tulloch Dr. and Biarritz St., >South to Valpico Rd., >East to S. Chrisman Rd., >West to McKenna Dr., Eastlake Cir. and Lakeview Dr.  See Map COMPLETE
    • South Central Tracy:  > North to R&R, > South to Valpico Rd., > East to Sycamore Pkwy, > West to Corral Hollow Rd.  See Map COMPLETE
    • Portion of North Ripon: >North to Diamond Way and River Rd., >South to Shasta Ave., >East to N. Ripon Rd., >West to Cornerstone Dr., Cady Ln. and Fulton Ave. See Map COMPLETE
    • Portion of North Stockton: >North to Eight Mile Rd., >South to Bear Creek, >East to Davis Rd., and Pixley Slough, >West to Thornton Rd. See Map COMPLETE
  • Ground spraying for larval mosquito control using Altosid Liquid larvacide concentrate, is scheduled for the morning of Friday, August 1, 2025 between 3:30 a.m. and 5:00 a.m.
    • Portion of South Manteca Area: >North to Wawona St., >South to Hwy 120, >East to S. Union Rd., > West to Airport Way  See Map  COMPLETE
  • Aerial spraying for adult mosquito control using Dibrom, is scheduled for the evening of Sunday, July 27, 2025, between 8:30 p.m. - 10:30 p.m. 
    • Delta area- Portions of Empire Tract and Terminous Tract  See Map  COMPLETE
  • Ground spraying for adult mosquito control using DeltaGard® and/or Evergreen 5-25, is scheduled for the morning of Thursday, July 24, 2025 between 3:30 a.m. and 5:30 a.m.
    • Rural East Ripon: >North to .6 mile south of Greenleaf Rd., >South to Stanislaus River, >East to Sexton Rd., >West to Wagner Rd. See Map.  COMPLETE
    • Southeast Ripon: >North to SSID Irrigation Canal and Milgeo Ave., >South to Reynolds Ave., >East to along the Stanislaus River and Murphy Rd., West to Manley Rd. See Map COMPLETE
  • Ground spraying for larval mosquito control using Altosid Liquid larvacide concentrate, is scheduled for the morning of Thursday, July 24, 2025 between 3:30 a.m. and 5:30 a.m.
    • Portion of East Manteca: >North to Northgate Dr., >South to W. Louise Ave., Joseph Dr., East to N. Main St., >West to Tidewater Park See Map  COMPLETE
  • Ground spraying for adult mosquito control using DeltaGard® and/or Evergreen 525, is scheduled for the morning of Thursday, July 17, 2025 between 3:30 a.m. and 5:30 a.m.
    • Rural Southeast Escalon: >North to River Rd., > South to Lee Ave., > East McBride Rd., >West to Santa Fe Rd. See Map  COMPLETE
    • Portion of South Manteca: >North to Wawona St., >South to Hwy 120, >East to S. Union Rd., > West to Airport Way  See Map  COMPLETE
    • North Manteca: >North to Birch Run Way & Freedom Point Way, >South to W. Lathrop Rd., >East to Green Valley Ln & Happy Valley Ln., >West to Union Rd. See Map COMPLETE
    • South Central Tracy: > North to R&R, > South to Valpico Rd., > East to Sycamore Pkwy, > West to Corral Hollow Rd. See Map COMPLETE
    • Portion of Central Tracy: >North to W. Mt. Diablo Ave., >South to W. Deerwood Ln. and Yosemite Dr., >East to MacArthur Dr. >West to S. Tracy Blvd. See Map COMPLETE
       
  • Ground spraying for larval mosquito control using Altosid Liquid larvacide concentrate, is scheduled for the morning of Thursday, July 17, 2025 between 3:30 a.m. and 5:30 a.m.
    • Portion of North Ripon: >North to Diamond Way and River Rd., >South to Shasta Ave., >East to N. Ripon Rd., >West to Cornerstone Dr., Cady Ln. and Fulton Ave. See Map COMPLETE 
       
  • Aerial spraying for adult mosquito control using Dibrom, is scheduled for the evening of Thursday, July 17, 2025, between 8:45 p.m. - 11:00 p.m. 
    • Portions of Shima Tract, Rindge Tract, Wright Tract See Map COMPLETE
       
  • Ground spraying for adult mosquito control using DeltaGard® and/or Evergreen 525, is scheduled for the morning of Friday, July 18, 2025 between 3:30 a.m. and 5:30 a.m.
    • Rural West Lodi: >North to Hwy 12, >South to White Sough, >East to 1/2 mile west of I5, >West to 2 & 1/3 miles west of I-5  See Map  COMPLETE
    • Delta: West Terminous Tract  See map  COMPLETE
  • Ground spraying for larval mosquito control using Altosid Liquid larvacide concentrate, is scheduled for the morning of Friday, July 18, 2025 between 3:30 a.m. and 5:30 a.m.
    • Portion of North Stockton: >North to E. Morada Ln., >South to Sandlewood Dr. & Fox Creek Dr., >East to West Lane and Ledgewood Ave., >West to R&R See Map COMPLETE
  • Ground spraying for adult mosquito control using DeltaGard®, is scheduled for the morning of Wednesday, July 16, 2025 between 3:00 a.m. and 5:00 a.m.
    • Portion of South Stockton: >North to Martin Luther King Blvd/Charter Way, >South to E. 9th Street, >East to U.P. RR tracks, >West to S. Sutter St. and S. San Joaquin St.  See Map COMPLETE
       
  • Ground spraying for larval mosquito control using Altosid Liquid larvacide concentrate, is scheduled for the morning of Wednesday,. July 16, 2025 between 3:00 a.m. and 5:00 a.m.
    • Southwest Stockton: >North to Carolyn West Blvd. and Steve Lillie Cir., >South to William Moss Blvd., >East McDougald Blvd., and Steve Lillie Cir., >West to Ews Woods Blvd. See Map  COMPLETE
  • Ground spraying for adult mosquito control using DeltaGard® and/or Evergreen 525, is scheduled for the morning of Thursday, July 10, 2025 between 3:30 a.m. and 5:00 a.m.
    • East Tracy:  >North to E. 3rd Street, >South to Yosemite Dr., >East to S. MacArthur Dr., >West to RxR See Map COMPLETE
    • South Tracy: >North to Valpico Rd. > South to Ridgeview Dr. > East to MacArthur Dr. > West to Glenbriar Cir.  See map  COMPLETE
    • Potion of Northeast Tracy: >North to E. Lowell Ave. and Acacia St., >South to Eleventh St., >East to Franklin Ave., >West to Holly Dr. See Map COMPLETE
  • Aerial spraying for adult mosquito control using Evergreen ULV 525 Air, is scheduled for the evening of Thursday, July 10, 2025, between 8:45 p.m. and 10:00 p.m. 
    • Delta Islands: Portions of Shima Tract, Rindge Tract, Wright Tract See Map COMPLETE
  • Ground spraying for larval mosquito control using Altosid Liquid larvacide concentrate, is scheduled for the morning of Tuesday, July 8, 2025, between 3:30 a.m. and 5:30 a.m.
    • West Escalon: >North to Yosemite Ave., >South to Valdapena Wy, Thompson Way, Zinfandel Dr. and Daniels Ave., >East to McHenry Ave., >West to Brennan Rd. See Map  COMPLETE
  • Ground spraying for adult mosquito control using DeltaGard® and/or Evergreen 525, is scheduled for the morning of Tuesday, July 8, 2025 between 3:30 a.m. and 5:30 a.m.
    • Rural East Escalon:  > North to 1/2 mile north of Owens Rd, > South to 1/2 mile south of Owens Rd., >East to Steinigal Rd., > West Campbell Rd. See Map  COMPLETE
    • Portion of North Ripon: >North to Diamond Way and River Rd., >South to Shasta Ave., >East to N. Ripon Rd., >West to Cornerstone Dr., Cady Ln. and Fulton Ave. See map COMPLETE
  • Aerial spraying for adult mosquito control using Evergreen ULV 525 Air, is scheduled for the evening of Wednesday, July 2, 2025, between 8:45 p.m. and 10:30 p.m. 
    • Delta Islands: Portions of Shima Tract, Rindge Tract, Wright Tract See Map COMPLETE
    • Delta Area West of Lodi: Portions of Brack Tract, Terminous Tract See Map COMPLETE
  • Ground spraying for larval mosquito control using Altosid Liquid larvacide concentrate, is scheduled for the morning of Thursday, July 3, 2025, between 3:30 a.m. and 6:00 a.m.
    • Portion of Southeast Tracy: >North to Biarritz St., >South to Valpico Rd., >East to S. Chrisman Rd., >West to Elissagaray Dr. and Mt. Pellier St. See Map  COMPLETE
  • Ground spraying for adult mosquito control using DeltaGard® and/or Evergreen 525, is scheduled for the morning of Thursday, July 3, 2025 between 3:30 a.m. and 6:30 a.m.
    • South Central Tracy:  >North to R&R, >South to Valpico Rd., >East to Sycamore Pkwy, >West to Corral Hollow Rd.  See Map COMPLETE
    • Central Tracy: >North to UPRR, >South to W. Schulte Rd., >East to S. MacArthur Dr. >West to S. Tracy Blvd. See Map  COMPLETE
    • Southwest Tracy: >North to W. Schulte Rd., >South to Western Pacific RR, >East to Corral Hollow Rd., >West to Lammers Rd. See Map  COMPLETE
    • Portion of Rural South County - Division Rd. Area:  >North to Division Rd., >South to San Joaquin and Stanislaus Rivers, >East to Stanislaus River, >West to Two Rivers Rd See Map COMPLETE
    • Rural East Manteca: >North to one mile north of Lone Tree Rd., >South to E. Lone Tree Rd., >East to Murphy Rd., >West to Jack Tone Rd. See Map COMPLETE
    • Rural Southeast Escalon: >North to River Rd., > South to Lee Ave., > East to McBride Rd., >West to Santa Fe Rd. See Map COMPLETE
    • North Stockton:  >North to Meadow Ave., >South to W. Lincoln Rd., >East to Pershing Ave., >West to Alexandria Place See Map COMPLETE
    • Delta: West Terminous Tract: See Map COMPLETE
  • Ground spraying for adult mosquito control using DeltaGard® and/or Evergreen 525, is scheduled for the morning of Saturday, June 28 2025 between 4:30 a.m. and 6:30 a.m.
    • Rural South Escalon:  >North to Greenleaf Rd., >South to Stanislaus River, >East to Stanislaus River, >West to Brennan Rd  See Map Canceled
    • Southeast Ripon: >North to SSID Irrigation Canal and Milgeo Ave., >South to Reynolds Ave., >East to along the Stanislaus River and Murphy Rd., West to Manley Rd. See Map COMPLETE
    • West Roberts Island: See Map COMPLETE

       
  • Aerial spraying for adult mosquito control using Dibrom, is scheduled for the evening of Saturday, June 28, 2025, between 9:00 p.m. and 10:30 p.m. 
    • North Delta: Portions of Brack Tract, Canal Ranch, Staten Island, and Terminous Tract  See Map COMPLETE
  • Ground spraying for adult mosquito control using DeltaGard® and/or Evergreen 525, is scheduled for the morning of Thursday, June 26 2025 between 3:30 a.m. to 5:30 a.m.
    • South Central Tracy:  >North to R&R, >South to Valpico Rd., >East to Sycamore Pkwy, >West to Corral Hollow Rd.  See Map COMPLETE
    • South Tracy: >North to Valpico Rd. > South to Ridgeview Dr. > East to MacArthur Dr. > West to Glenbriar Cir. See Map COMPLETE
  • Ground spraying for larval mosquito control using Altosid Liquid larvacide concentrate, is scheduled for the morning of Thursday, June 26, 2025, between 3:30 a.m. and 5:00 a.m.
    • Portion of East Manteca: >North to Louise Ave., >South to E. Edison St, >East to Hwy 99, >West to Garden Gate Dr. See Map COMPLETE
       
  • Aerial spraying for adult mosquito control using Dibrom, is scheduled for the evening of Thursday, June 26, 2025, between 8:40 p.m. and 10:00 p.m. 
    • Portions of the following Tracts: Wright-Shima-Rindge & Lower Roberts Island  See Map COMPLETE
    • Portion of Rural South County: See Map COMPLETE
  • Ground spraying for adult mosquito control using DeltaGard® and/or Evergreen 525, is scheduled for the morning of Thursday, June 26 2025 between 3:30 a.m. to 5:30 a.m.
    • South Central Tracy:  >North to R&R, >South to Valpico Rd., >East to Sycamore Pkwy, >West to Corral Hollow Rd.  See Map COMPLETE
    • South Tracy: >North to Valpico Rd. > South to Ridgeview Dr. > East to MacArthur Dr. > West to Glenbriar Cir. See Map COMPLETE
       
  • Ground spraying for larval mosquito control using Altosid Liquid larvacide concentrate, is scheduled for the morning of Thursday, June 26, 2025, between 3:30 a.m. and 5:00 a.m.
    • Portion of East Manteca: >North to Louise Ave., >South to E. Edison St, >East to Hwy 99, >West to Garden Gate Dr. See Map COMPLETE
       
  • Aerial spraying for adult mosquito control using Dibrom, is scheduled for the evening of Thursday, June 26, 2025, between 8:40 p.m. and 10:00 p.m. 
    • Portions of the following Tracts: Wright-Shima-Rindge & Lower Roberts Island  See Map COMPLETE
    • Portion of Rural South County: See Map COMPLETE
  • Ground spraying for adult mosquito control using Evergreen 525, is scheduled for the morning of Tuesday, June 24 2025 between 5:30 a.m. to 7:00 a.m.
    • Rural North Escalon: >North to Yosemite Ave., >South to Allen Rd., >East to S. Van Allen Rd., >West to Von Glahn Rd. See Map  COMPLETE
  • Ground spraying for adult mosquito control using DeltaGard® and/or Evergreen 525, is scheduled for the morning of Monday, June 23 2025 between 3:30 a.m. to 5:30 a.m.
    • Portion of South Central Tracy:  >North to R&R, >South to Valpico Rd., >East to Sycamore Pkwy, >West to Corral Hollow Rd. See Map  COMPLETE
    • Central Tracy: >North to UPRR, >South to W. Schulte Rd., >East to S. MacArthur Dr. >West to S. Tracy Blvd. See Map  COMPLETE
    • Portion of East Manteca: >North to Louise Ave., >South to E. Edison St, >East to Hwy 99, >West to Garden Gate Dr. See Map COMPLETE
    • Rural Northeast Escalon: >North to Grooms Rd., >South to Thalheim Colony Rd., >East to Victory Ave., >West to Steinegul Rd. See Map COMPLETE
       



 

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