Environmental Groups Challenge Proposed Canadys Gas Plant
Advocates argue the massive project's emission limits fail to meet federal standards for air quality.
Updated on Oct. 28, 2026 in Utilities
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Environmental groups have submitted formal comments to the South Carolina Department of Environmental Services opposing a draft air permit for the proposed 2,180-megawatt Canadys gas plant. The facility is a joint venture between Dominion Energy South Carolina and Santee Cooper planned for the site of a retired coal plant on the Edisto River.
Why it matters
The groups assert that the plant's proposed emission limits for particulate matter and other pollutants are unlawful and exceed levels permitted for similar facilities nationwide. They are calling on regulators to address these environmental concerns before finalizing the project's permits.
The proposed facility will replace a 490-megawatt coal plant with a 2,180-megawatt gas plant. Air pollution from the site is projected to reach as far as 50 miles downwind toward Charleston.
The players
Southern Environmental Law Center
This nonprofit organization uses the power of the law to protect the environment and health of the communities in the South.
Dominion Energy South Carolina
This major energy company provides electricity and natural gas service to homes and businesses across the state.
Santee Cooper
This state-owned electric and water utility serves as South Carolina's largest power provider.
South Carolina Department of Environmental Services
This state agency is responsible for protecting the environment and public health of South Carolina residents.
The details
The challenge identifies flaws in the impact analysis provided by the utilities, specifically regarding federal stringency requirements for particulate matter. The plant is expected to emit a range of substances including nitrogen oxides, sulfur dioxide, and hazardous air pollutants in an area that includes four licensed childcare facilities.
Timeline
In May 2026, the South Carolina Public Service Commission granted the project a Certificate of Environmental Compatibility.
In October 2026, environmental groups submitted formal comments on the draft air permit.
Market Landscape
The proposed plant reflects a broader industry trend of transitioning generation capacity from retired coal assets to natural gas facilities. This move positions the joint venture to replace retiring infrastructure while facing increasing scrutiny over regional compliance with federal air quality standards.
The potential approval of this plant could impact local air quality for residents in Colleton County and surrounding areas, including those near the four identified childcare facilities. Should the permit process continue, it may alter future energy infrastructure development plans across the state.
The takeaway
The ongoing regulatory review highlights the tension between expanding utility infrastructure and maintaining strict emission requirements. Residents near the Edisto River should monitor upcoming public hearings for further updates on the project's permitting status.
Further reading
Learn more about the latest energy projects in the state by visiting the South Carolina Utilities section.
Source note: This article includes information reported by Cleanenergy.
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