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:

• 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

Past Completed Spray Operations:

• 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
     
• Ground spraying for adult mosquito control using DeltaGard® and/or Evergreen 525, is scheduled for the morning of Thursday, June 18, 2025 between 5:00 a.m. to 6:30 a.m.
  • 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
  • Wright/Elmwood Tract: See Map  COMPLETE
• Ground spraying for adult mosquito control using Evergreen 525, is scheduled for the morning of Friday, June 13, 2025 between 5:00 a.m. to 6:30 a.m.
  • 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
• Ground spraying for adult mosquito control using DeltaGard® and/or Evergreen 525, is scheduled for the morning of Thursday, June 5, 2025 between 4:00 a.m. to 6:30 a.m.
  • 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
  • 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
  • Portion of Rural Northeast Escalon: >North to Doods Rd., >South to Dutra Ln., >East to Cometa Rd. & Victory Ave., >West to Steinegul Rd. See Map COMPLETE

• Ground spraying for larval mosquito control using Altosid Liquid larvacide concentrate, is scheduled for the morning of Thursday, June 5, 2025, between 4:00 a.m. and 5:00 a.m.
  • Portion of North Ripon: >North to W. Santos Ave., >South to W. Milgeo Ave., >East to Ripon Rd. and John Roos Ave. >West to Fulton Ave. and Arc Way See Map COMPLETE

• Ground spraying for adult mosquito control using DeltaGard® and/or Evergreen 525, is scheduled for the morning of Tuesday, May 20, 2025 between 5:00 a.m. to 6:30 a.m.
  • Portion of Rural Southeast Escalon: >North to Lemon Ave., South to East River Rd., >East to Sutliff Rd. and Henry Rd., >West to Santa Fe Rd. and Harrold Rd. See Map COMPLETE

• Ground spraying for adult mosquito control using DeltaGard® and/or Evergreen 525, is scheduled for the morning of Friday, May 9, 2025 between 5:00 a.m. to 6:30 a.m.
  • Portion of Southeast Escalon: >North to Combs Rd., >South to East River Rd., >East to Victory Ave., >West to Henry Rd. See Map COMPLETE
    
     

 

---

West Nile Virus and
Dead Bird Hotline

(877) 968-BIRD (2473)

or online at westnile.ca.gov

---

Stay Informed!
Get Email Updates.

Sign up to receive email updates including news releases and spray updates.