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 Operation:

  • Aerial spraying for adult mosquito control using Dibrom®, is scheduled for the evening of Monday, September 15, 2025, between 8:30 p.m. and 11:00 p.m.
  • Aerial spraying for adult mosquito control using Evergreen 5-25 Air, is scheduled for the evening of Monday, September 15, 2025, between 8:00 p.m. and 10:00 p.m.
    • Delta Area: Portion of Brack Tract: See Map COMPLETE
    • Delta Area: South Staten Island and Portions of Brack Tract  See Map.COMPLETE

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Past Completed Spray Operations:

  • Ground spraying for adult mosquito control using  DeltaGard® and/or Evergreen 5-25, is scheduled for the morning of Friday, September 12, 2025 between 3:30 a.m. and 6:00 a.m.
    • Portion of Southwest Stockton:  >North to Watercourse St., >South to Henry Long Blvd, >East to Weston Ranch San Joaquin Trail/Green Belt, >West to San Joaquin River  See Map COMPLETE
    • Portion of Rural South Farmington: >North to Little John Creek, >South to 1/2 mile south of Skiff Rd., >East to Biederman Way, >West to Van Allen Rd. See Map COMPLETE
       
  • Ground spraying for larval mosquito control using Altosid Liquid larvacide concentrate is scheduled for the morning of Friday, September 12, 2025, between 3:30 a.m. and 6:00 a.m.
    • Portion of North Stockton- Quail Lakes Area: >North to Quail Lakes Drive, >South to March Ln., >East to N. Pershing Ave., >West to Quail Lakes Dr.  See Map  COMPLETE
  • Ground spraying for adult mosquito control using  DeltaGard® and/or Evergreen 5-25, is scheduled for the morning of Thursday, September 11, 2025 between 3:30 a.m. and 6:00 a.m.
    • City of Escalon: North to Deborah Cir > East to St John Rd > South to Catherine Way > West to Swanson Dr  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
    • 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
    • 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
    • Portion of North Ripon: >North to SSJ Canal, >South to E. Milgeo Ave., >East to S. Murphy Rd., >West to N. Ripon 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
    • Portion of Rural South County:  > North to one mile north of E. McMullin Rd., > South to Perrin Rd., > East to Airport Way, > West to S. Hays Rd. See Map COMPLETE
    • Southwest Tracy: >North to W. Schulte Rd, >South to W. Central, >East to Tracy Blvd., >West to Sycamore Pkwy See Map COMPLETE
  • Aerial spraying for adult mosquito control using Dibrom, is scheduled for the evening of Thursday, September 4, 2025, between 8:00 p.m. and 10:00 p.m. 
    • Delta Area- Portions of Shima Tract, Rindge Tract, Wright Tract See Map COMPLETE
    • A Portion of Rural South County See Map  COMPLETE
  • Ground spraying for adult mosquito control using  DeltaGard® and/or Evergreen 5-25, is scheduled for the morning of Thursday, September 4, 2025 between 3:30 a.m. and 5:30 a.m.
    • Portion of Delta North: >North to +- 1.5 miles north of W. Walnut Grove Rd., >South to W. Walnut Grove Rd., >East to Sacramento County Line, >West to +- .5 mile west of Sacramento County Line See Map COMPLETE
    • East Lodi Area: >North to E. Lockeford St.,  >South to E. Vine Street, >East to S. Cherokee Ln., >West to S. Stockton St. See Map  COMPLETE
    • Portion of South Stockton: >North to Dr. Martin Luther King Blvd., >South to E. 9th Street, >East to U.P. RR tracks, >West to S. El Dorado St.  See Map COMPLETE
    • North Lathrop: >North to Roth Rd., >South to W. Lathrop Rd., >East  to RR Tracks, > West to S. Harlan Rd. See Map Postponed
    • Portion of East Manteca: >North to Southland Rd., >South to E. Yosemite Ave., >East to S. Austin Rd., >West to Cottage Ave. and Hwy. 99 See Map COMPLETE
    • Portion of South Manteca: >North to E. Woodward Ave., >South to Tannehill Dr., >East to Pillsbury Rd., >West to S. Main St. See Map COMPLETE
    • Portion of Rural East Lockeford: >North to Brandt Rd., >South to E. Sargent Rd., >East to Linn Rd., >West to N. Tully Rd. See Map COMPLETE
  • Ground spraying for larval mosquito control using Altosid Liquid larvacide concentrate, is scheduled for the morning of Thursday, September 4, 2025 between 3:30 a.m. and 5:30 a.m.
    • Portion of North Manteca: >North to Northgate Dr., >South to W. Louise Ave. and Joseph Rd. >East to N. Union Rd., >West to N. Main St. & Tidewater Trail See Map COMPLETE
  • Aerial spraying for adult mosquito control using Dibrom, is scheduled for the evening of Sunday, August 31 2025, between 8:00 p.m. and 10:00 p.m. 
    • Delta area- Portions of Empire Tract and Terminous Tract See Map  COMPLETE
    • A Portion of Brack Tract See Map  COMPLETE
  • Ground spraying for adult mosquito control using  DeltaGard® and/or Evergreen 5-25, is scheduled for the morning of Friday, August 29, 2025 between 3:30 a.m. and 6:00 a.m.
    • Portion of Rural South Farmington: >North to Little John Creek, >South to 1/2 mile south of Skiff Rd., >East to Biederman Way, >West to Van Allen Rd.  See Map COMPLETE 
    • Delta- A Portion of Southeast Roberts Island:  >North to Howard Rd., >South to W. Carlin Rd., >East to San Joaquin River, >West to S. Roberts Rd.  See Map COMPLETE 
    • Delta- West Roberts Island:  See Map COMPLETE 
    • Thornton Area: >North to N. New Hope Rd., >South to W. Kile Rd., >East to Kile Rd., >West to 1/2 mile East of Blossom Rd. See Map COMPLETE 
    • 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 
    • Portion of Northwest Stockton: >North to Stanfield Dr., >South to Mosher Slough, >East to Thornton Rd., >West to Bainbridge Pl.  See Map COMPLETE 
  • Aerial spraying for adult mosquito control using Dibrom, is scheduled for the evening of Wednesday, August 27, 2025, between 8:00 p.m. and 10:00 p.m. 
    • Delta Area West of Stockton: Portions of Shima Tract, Rindge Tract, Wright Tract See Map  COMPLETE
    • A Portion of Rural South County:  See Map  COMPLETE 
  • Ground spraying for adult mosquito control using  DeltaGard® and/or Evergreen 5-25, is scheduled for the morning of Thursday, August 28, 2025 between 3:30 a.m. and 5:30 a.m.
    • Ripon Sewer: >North to Doak Rd., >South to Stanislaus County Line, >East to Stockton Ave., >West to Robert Ave.  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
    • Eastern Portion of the City of Escalon: >North to California St., >South to Vine Ave., >East to Brook St., >West to Main St. See Map COMPLETE
    • Rural North Escalon: >North to one mile north of Lone Tree Rd., >South to one mile south of Lone Tree Rd., >East to Campbell Rd., >West to Brennan 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
  • Ground spraying for adult mosquito control using  DeltaGard® and/or Evergreen 5-25, is scheduled for the morning of Wednesday, August 27, 2025 between 3:30 a.m. and 6:00 a.m.
    • Portion of North Escalon Area: >North to Magnolia Rd., >South to Hwy 120 & California St., > East to Campbell Ave., >West to Escalon-Bellota Rd.  See Map COMPLETE
    • Portion of Southwest Stockton: >North to Carlin Rd. >South to Undine Rd. >East to S. Roberts Rd. > West to Middle River. See Map COMPLETE
    • Southwest Stockton Area- Weston Ranch 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
    • Southwest Stockton- Portion of Weston Ranch: >North to William Moss Blvd, >South to Henry Long Blvd, >East to Blake Cir., >West to Blake Circle and Sydney Ln. See Map COMPLETE
    • North Delta: >North to +- 1.5 miles north of W. Walnut Grove Rd., >South to W. Walnut Grove Rd., >East to Sacramento County Line, >West to +- .5 mile west of Sacramento County Line See Map COMPLETE
  • Ground spraying for larval mosquito control using Altosid Liquid larvacide concentrate, is scheduled for the morning of Wednesday, August 27, 2025 between 3:30 a.m. and 5:00 a.m.
    • Portion of North Stockton: >North to Whistler Way, >South to the south side of Broadridge Way, >East to Bear Creek, >West to Thornton Rd. See Map COMPLETE
  • Ground spraying for adult mosquito control using  DeltaGard® and/or Evergreen 5-25, is scheduled for the morning of Saturday, August 23, 2025 between 4:30 a.m. and 6:30 a.m.
    • Portion of Southwest Stockton: >North to Carlin Rd. >South to Undine Rd. >East to S. Roberts Rd. > West to Middle River. See Map COMPLETE
  • Ground spraying for adult mosquito control using  DeltaGard® and/or Evergreen 5-25, is scheduled for the morning of Thursday, August 21, 2025 between 3:30 a.m. and 5:30 a.m.
    • Portion of Rural South Stockton: >North to E. Munford Ave. & Catamaran Wy., >South to Industrial Dr. and Bayliner Dr.,  >East to Hwy 99, West to Pock Ln. & Lanyard Dr.  See Map COMPLETE
    • Rural West Lathrop: > North to Frewert Rd., > South to Lathrop Rd., > East to I-5, > West to San Joaquin River   See Map COMPLETE
    • Portion of North Ripon:  >North to SSJ Canal, >South to E. Milgeo Ave., >East to S. Murphy Rd., >West to N. Ripon Rd.  See Map  COMPLETE
    • Southwest Delta area: Portion of Upper Jones Tract: See Map COMPLETE
       
  • Aerial spraying for adult mosquito control using Evergreen Air 5-25, is scheduled for the evening of Thursday, August 21, 2025, between 8:00 p.m. and 10:30 p.m. 
    • Delta Area West of Lodi: Delta Area: Portions of Brack Tract, Terminous Tract including Tower Park, Bouldin Island, and Staten Island 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
  • Ground spraying for adult mosquito control using  DeltaGard® and/or Evergreen 5-25, is scheduled for the morning of Friday, August 22, 2025 between 3:30 a.m. and 5:30 a.m.
    • Portion of Rural North San Joaquin County:  >North to Collier Rd., >South to E. Jahant Rd., >East to N. Watkinson Rd., >West to Elliot Rd. See Map COMPLETE
    • Ripon Sewer: >North to Doak Rd., >South to Stanislaus County Line, >East to Stockton Ave., >West to Robert Ave.  See Map  COMPLETE
    • Ripon Spring Creek Golf and Country Club:  See Map  COMPLETE
    • South Tracy: >North to Valpico Rd. > South to Ridgeview Dr. > East to MacArthur Dr. > West to Glenbriar Cir. See Map  COMPLETE
    • Portion of East Manteca: >North to Louise Ave., >South to E. Edison St, >East to Hwy 99, >West to N. Main St. See Map  COMPLETE
    • Portion of North Manteca: >North to Northgate Dr., >South to W. Louise Ave. and Joseph Rd. >East to N. Union Rd., >West to N. Main St. & Tidewater Trail  See Map COMPLETE
    • Portion of Rural South County - Division Road Area: >North to Division Rd., >South to San Joaquin and Stanislaus Rivers, >East to Stanislaus River, >West to Two Rivers Rd See Map COMPLETE
  • Ground spraying for adult mosquito control using  DeltaGard® and/or Evergreen 5-25, is scheduled for the morning of Thursday, August 14, 2025 between 3:30 a.m. and 5:00 a.m.
    • Portion of Rural South County:  >North to Airport Way, Division Rd. and Avenue D, >South to San Joaquin and Stanislaus Rivers, > East to Stanislaus River, >West to San Joaquin River See Map COMPLETE
    • Portion of South Ripon: >North to Fourth St. >South the Stanislaus River >East to Stockton Ave. > West to S. Mohler Rd.  See Map COMPLETE
    • Portion of 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
    • Portion of North Escalon Area: >North to Magnolia Rd., >South to Hwy 120 & California St., > East to Campbell Ave., >West to Escalon-Bellota Rd. See Map  COMPLETE
    • West Roberts Island: See Map COMPLETE
    • 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
  • Aerial spraying for adult mosquito control using Dibrom, is scheduled for the evening of Thursday, August 14, 2025, between 8:15 p.m. and 10:00 p.m. 
    • Delta area: Portions of Shima Tract, Rindge Tract, Wright Tract  See Map  COMPLETE
    • 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 Friday, August 15, 2025 between 3:30 a.m. and 5:00 a.m.
    • Portion of North Stockton:  >North to Hammer Ln., >South to W. Lincoln Rd., >East to Pershing Ave., >West to Alexandria Place See Map COMPLETE
    • North Morada: >North to Zeppelin Ln., >South to E. Morada Ln., >East to 99 Frontage Rd., >West to Holman Rd.   See Map COMPLETE
    • Portion of Rural West Farmington: >North to Little Johns Creek, >South to Gawne Rd., >East to Mobley Rd., >West Stow Ave. See Map COMPLETE
    • Southwest Stockton- Portion of Weston Ranch: >North to William Moss Blvd, >South to Henry Long Blvd, >East to Blake Cir., >West to Blake Circle and Sydney Ln See Map COMPLETE
    • Southwest Stockton Area- Weston Ranch 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
  • Ground spraying for adult mosquito control using  DeltaGard® and/or Evergreen 5-25, is scheduled for the morning of Tuesday, August 12, 2025 between 3:30 a.m. and 5:00 a.m.
    • Portion of North Escalon Area: >North to Magnolia Rd., >South to Hwy 120 & California St., > East to Campbell Ave., >West to Escalon-Bellota 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 South Manteca:  >North to Wawona St., >South to Hwy 120, >East to S. Union Rd., > West to Airport Way. See Map COMPLETE
    • Portion of South Manteca: >North to E. Woodward Ave., >South to Tannehill Dr., >East to Pillsbury Rd., >West to S. Main St. See Map COMPLETE

 



 

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