October & November
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2016 Gas Cap Testing and Replacement Program - Summary Report

The Gas Cap Testing and Replacement program has operated in northwest Ohio since 2000 and since 2008, TMACOG has partnered with the City of Toledo Division of Environmental Services for the summer outreach effort. This program invites drivers to bring passenger cars and light trucks to testing sites where staffers perform a quick vacuum test of the gas cap. Leaking caps are replaced on the spot. The goal of the program is to educate the general public on the importance of a properly functioning gas cap and the impact of gas emissions on ground level ozone pollution, or smog. Replacing leaking caps has a direct effect on air quality.

At each testing event, a program representative records the year, make, and model of each vehicle being tested and notes how its gas cap performed. The 2016 failure rate was 11.72%, similar to a failure rate of 11.06% from 2015. See the complete report here. It details car models tested, marketing efforts, and historical data.

After analyzing all of the data collected, it is apparent that there was one vehicular characteristic that increases the probability of a car having a damaged gas cap: the age of the vehicle. These findings have remained consistent over the years.

There were 27 testing sites in 2016: in the cities of Bowling Green, Holland, Maumee, Northwood, Oregon, Perrysburg, Rossford, Sylvania, Toledo, Waterville, and Whitehouse in Ohio as well as Lambertville, Michigan. This year’s program tested 486 gas caps and replaced 57 missing or faulty gas caps. The program prevented approximately 11,343 pounds of pollution from entering the atmosphere. Along with the physical testing of gas caps, the program provided motorists with information on the importance of replacing faulty gas caps and what they can do to reduce air pollution.

In northwest Ohio and southeast Michigan, motorists are not required to have vehicles checked for emissions. However, the Gas Cap Testing and Replacement Program provides a simple, quick, and free way for motorists to potentially cut back on their emissions.

Thank you to the sponsors who allow us to use their locations for testing: Kroger, True North/Shell, Barney’s, and Circle K gas stations

On this chart, the blue bar depicts the number of vehicles with gas caps that passed, while the red bar indicates the number of gas caps that failed for each respective annual set. Very old cars are most likely to have leaky caps.


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