From The Banner · Adam Willis · · 1m
Chesapeake Bay Healthiest in Decades
Chesapeake Bay scores highest health rating in 40 years, with 56% water quality.
In brief
Chesapeake Bay scores highest health rating in 40 years, with 56% water quality. Chesapeake Bay health improved to 56% in 2025, the highest score in nearly 40 years of monitoring. Originally reported by The Banner.
Chesapeake Bay Health Report
The Chesapeake Bay's water quality scored 56% in 2025, the highest in nearly 40 years of monitoring.
Annual Report Card
University of Maryland Center for Environmental Science released the 2025 report card Tuesday.
Health Improvement
The bay's health improved 6 points from 2024, reaching a C+ grade.
Drought Impact
Maryland's drought reduced rainfall, contributing to the bay's water quality score.
Nutrient Pollution
Nitrogen and phosphorus pollution levels are steadily improving across most regions.
Underwater Grasses
Maryland's underwater grasses expanded 13% last year, with oysters showing steady resurgence.
Regional Differences
Virginia's Lower Bay scored a B+ while Maryland's regions scored C grades.
Baltimore Rivers
Patapsco and Back rivers improved water quality since 1986, but phosphorus levels are rising.
Here's the gist
Chesapeake Bay health improved to 56% in 2025, the highest score in nearly 40 years of monitoring.
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