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Photograph of rooftop photovoltaic panels

Climate and Environment

Cambridge strives to be a sustainable city that cultivates its natural systems, limits its greenhouse gas emissions, and is resilient to the impacts of climate change. Cambridge actively develops green infrastructure, sets smart environmental regulations, and incentivizes private action to create a sustainable environment for all. The City’s programs, policies, and plans aim to illuminate the connections between energy consumption, stewardship of natural ecologies, mitigation of extreme weather, and the health and well-being of its people.

Envision indicators are updated as new data becomes available, which varies by indicator, but no more often than annually.

View the Climate and Environment Plan

Key Actions

Establish solar and/or cool roof requirements for new construction.

StrategyAccelerate the transition to net zero greenhouse gas emissions for buildings in the city.
Core Values
  • Sustainability & Resilience
Action TypeZoning Changes
Lead DepartmentCDD
StatusCompleted

Install electric vehicle charging stations in accessible locations.

StrategyReduce transportation-related greenhouse gas emissions.
Core Values
  • Equity & Diversity
  • Sustainability & Resilience
Action TypeCapital investments
Lead DepartmentCDD
StatusIn Progress
Project PhaseMiddle phase

Purchase 100% of municipal electricity from renewable sources.

StrategyAccelerate the transition to net zero greenhouse gas emissions for buildings in the city.
Core Values
  • Sustainability & Resilience
Action TypePrograms and operations
Lead DepartmentCDD
StatusIn Progress
Project PhaseFinal phase

Increase energy efficiency requirements for building projects, including new construction and renovations.

StrategyAccelerate the transition to net zero greenhouse gas emissions for buildings in the city.
Action TypeOther regulatory changes
Lead DepartmentCDD
StatusIn Progress
Project PhaseOngoing

Implement recommendations from the Urban Forest Master Plan and Resilient Cambridge.

StrategyRestore and grow Cambridge's green infrastructure and tree canopy, and support biodiversity.
Action TypeCapital investments
Lead DepartmentPublic Works
StatusIn Progress
Project PhaseEarly phase

Include green infrastructure in city park, open space, sidewalk, and street reconstruction projects.

StrategyRestore and grow Cambridge's green infrastructure and tree canopy, and support biodiversity.
Core Values
  • Community Health & Wellbeing
  • Livability
  • Sustainability & Resilience
Action TypeCapital investments
Lead DepartmentPublic Works
StatusIn Progress
Project PhaseOngoing

View All Actions

Indicators

Pounds of trash collected per household per week

Improving

This indicator provides insight into the City’s efforts to reduce and divert waste from landfills via recycling and separation of organics from other waste streams.

The chart shows the yearly average amount of trash collected each week from Cambridge households.

Source: DPW
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Tree canopy coverage

Improving

This indicator provides insight into the success of actions to preserve and expand Cambridge’s tree canopy, particularly in neighborhoods that currently lack trees. These efforts benefit the natural environment and contribute to general quality of life.

Source: University of Vermont Spatial Analysis Laboratory in collaboration with City of Cambridge
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Percentage of land area covered by non-building impervious surfaces

Meeting target

An impervious surface is one that water can't pass through. Impervious surfaces create numerous environmental problems, including limiting natural filtration of stormwater into soil and absorption of heat from the sun, generating an “urban heat island.” Impervious surfaces can include buildings, streets, parking lots, and other paved areas.

Source: 2018 planimetric data, with edits and corrections by Cambridge GIS Department.
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Percentage of land area at risk of flooding due to a 10-year storm by 2070

Meeting target

As the climate changes, Cambridge will be more at risk of flooding, both from stormwater during major storms and the combined effects of sea level rise and storm surges. Some parts of Cambridge are more at risk than others. This indicator tracks our success at adapting to flood risk through infrastructure investment and regulation.

Source: CDD GIS / DPW - (precipitation based hydraulic/hydrologic modeling by City of Cambridge and sea level rise/storm surge model Massachusetts Coastal Flood Risk Model (MC-FRM).
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Percentage of land area at risk of flooding due to a 100-year storm by 2070

Meeting target

As the climate changes, Cambridge will be more at risk of flooding, both from stormwater during major storms and the combined effects of sea level rise and storm surges. Some parts of Cambridge are more at risk than others. This indicator tracks our success at adapting to flood risk through infrastructure investment and regulation.

Source: CDD GIS / DPW - (precipitation based hydraulic/hydrologic modeling by City of Cambridge and sea level rise/storm surge model Massachusetts Coastal Flood Risk Model (MC-FRM).
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Water use

Exceeding target

Tracking the total consumption of potable water will provide insight into conservation and efficiency efforts. These efforts contribute to a more sustainable future for Cambridge. This indicator measures the change in water use (in gallons per day) vs. the baseline year, 2017, for residential and non-residential end uses.

The target for this indicator is that residential and non-residential water use should increase at a rate less than the increase in population or employment, respectively.

Source: Water use data: Cambridge Water Dept. Annual Statistical Reports, submitted to Mass DEP. Data from table DS-3, Metered Finished Water Use.
Residential Population: Census Population Estimates Program
Employment: MA Dept of Economic Research Employment and Wages Report (ES-202), annual report for all ownership types and all industries.
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Percentage of total flat roof area that has high reflectivity.

Improving

Reflective roof surfaces reduce the urban heat island effect by reflecting the sun's energy away instead of absorbing it as heat in a building. By increasing the number of reflective roofs in the city, we can help reduce the temperature of the city on hot days. Reflective roofs are easiest to apply to flat roofs as typically found on large commercial buildings.

Source: Citywide digital 3D building layer and citywide orthophotos.
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