Tennessee Clerk
County Clerk Mail &
Internet Services
PO Box 24868
Chattanooga, TN 37422
Fax: 423-209-7936

Hours: Mon - Fri
8:00am - 4:30pm EST
except designated holidays

Email County Clerk

Plate Renewals
New Business Application
Minimal Renewal
W.F. (BILL) KNOWLES - County Clerk
This online tag renewal is intended for current Hamilton County Residents only.
Available Online Services
Plate Renewals
New Business Application
Minimal Renewal

Air Pollution Board Emission Testing Update

Update May 12, 2020: We have been informed by the State that emission stations are scheduled to re-open May 26th. Vehicle emission testing is not required for current registrations expiring May 31, 2020. Vehicle tags expiring beginning with the month of June, 2020 and thereafter require an emission test. Vehicle title applications made prior to June 1, 2020 do not require an emissions test. Until further notice the State’s Bonnyshire emission testing station will remain closed for COVID-19 drive through testing as scheduled by the Hamilton County Health Department.

Emission testing remains in effect prior to titling or renewing a vehicle registration until repeal is approved by the United States Environment Protection Agency (EPA).

The Tennessee Department of Environment and Conservation announced in May 2019 that they will recommend elimination of emission testing in counties, including Hamilton. The State Implementation Plan revisions eliminating the vehicle emissions testing program were submitted to the EPA on February 27, 2020. The program will end 120 days after the EPA approves the State Implementation Plan revisions. Updates will be posted as they become available.


Frequently Asked Questions and Timeframe from the TN Department of Environment and Conservation.