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San Diego County Vector Control Program
San Diego Eye Gnat Research Project

Eye Gnats

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eye gnat

Eye gnats are small, shiny black flies approximately 1/16 inch in size. They breed in organically rich soil and are normally found at very low numbers in many parts of San Diego County. To produce their eggs, eye gnats feed on the protein found in body secretions such as mucus from the eyes and nose. In large numbers, they can be an annoyance to both people and animals.

Eye gnats are often misidentified as: 
Fruit FliesFungus Gnats
(photo courtesy of David Reyes)(photo courtesy of Kim Fleming)

County Ordinances relating to Eye Gnat Program 

If you would like to sign up to receive e-mail announcements on the eye gnat program please click on the link:  E-Gov Delivery Notice Subscription If this link does not work, please visit and subscribe to Eye Gnats, Public Meeting Update under Environmental Health.


Eye Gnat Program Supporting Documents:

March 20, 2013 Proposed Amendments to Title 6 County Code of Regulatory Ordinance

Chapter 2 and 4, Title 6 County Code of Regulatory Ordinance

Article XV-AA County Administrative Code

Negative Declaration

Initial Study

Best Management Practices

Ordinance Compliance Checklist

Environmental Findings

Multiple Species Conservation Program Findings

Response to Comments

Public Comments

                Oppose 1 of 3

                Oppose 2 of 3

                Oppose 3 of 3

                Support 1 of 1

Statement of Location and Custodian 

Candidate Measures

                Proper Fertilizer Use

                Irrigation Practices

Eye Gnats in San Diego County Eye Gnat Research and Education Project
Jacumba Eye Gnat Project2012-13 Final Report
South Escondido Eye Gnat Summary2011 Final Report
Eye Gnat Frequently Asked Questions2010 Final Report
Instructions to Make Eye Gnat Trap2009 Final Report