Ecochallenge Action Impact Formulas

At Ecochallenge.org our goal is to help individuals, communities and organizations take action against climate change and other systemic issues. In doing this, we've heard that one of the most gratifying parts of participating in an Ecochallenge event is watching all of the impact add up over the course of an event ( check out the historical impact of Ecochallenge). If you've ever wondered how we calculate the impact for some of our actions that focus on real world energy, emissions, and water savings, you'll find all of the formulas we use below. Have questions, concerns of feedback on how we can more accurately track our collective impact? Please reach out to us at support@ecochallenge.org.

Transportation Formulas

Impact Relevant Action(s) Standard Formula Inputs Source
Pounds of CO2 Saved (Airline) Choose a Carbon Offset

Stay on the Ground
"formula": "INPUT_1 * 0.24" INPUT_1 = Distance of flight in Miles BlueSkyModel
Pounds of CO2 Saved (Public Transit) Use Public Transit "formula": "((POST_1 / INPUT_1) * 19.59) - (POST_1 * .64)" INPUT_1 = MPG of participants car
POST_1 = Miles traveled by public transit instead of car
American Bus Association

EPA  GHG Emissions
Pounds of CO2 Saved (Bike) Go by Bike "formula": "((POST_1 / INPUT_1) * 19.59) - (POST_1 * 0.0176)" INPUT_1 = MPG of participants car
POST_1 = Miles traveled by bike instead of car
EPA  GHG Emissions
Pounds of CO2 Saved (Walk) Walk Instead "formula": "((POST_1 / INPUT_1) * 19.59) - (POST_1 * 0.0)" INPUT_1 = MPG of participants car
POST_1 = Miles traveled by walking instead of car 
EPA  GHG Emissions

Energy Formulas

Impact Relevant Action Standard Formula Source
Pounds of CO2 Saved Switch to Cold Water "formula": "4.38 lbs/CO2 * DAYS_REMAINING_IN_CHALLENGE" American Cleaning Institute

Water Formulas

Impact Relevant Action Standard Formula Inputs Source
Gallons of Water Saved
5-Minute Showers "formula": "6 gal * 1"

Home Water Works - Showers
Gallons of Water Saved Install a Toilet Bank "formula": "11 gal * DAYS_REMAINING_IN_CHALLENGE"

Home Water Works - Toilets
Gallons of Water Saved Conserve Toilet Water "formula": "8 gal * 1"

Home Water Works - Toilets
Gallons of Water Saved Fix Leaky Faucets "formula": "POST_1 * 3 gal * DAYS_REMAINING_IN_CHALLENGE"
POST_1 = # of faucets    
USGS Drip Calculator
Gallons of Water Saved Install a Low-Flow Showerhead "formula": "8 gal * DAYS_REMAINING_IN_CHALLENGE" Home Water Works - Showers

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