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Coastal Bays Health IndexThe Coastal Bays Health Index, for each region, averages (i.e., equally weights) the six indicators used into a single overarching index score. This score evenly combines all six indicators (chlorophyll a, dissolved oxygen, TN, TP, seagrasses, and hard clam) into an overall assessment of health for each region. Each region's score is then area-weighted and averaged to produce the overall Coastal Bays grade.
Maryland Coastal Bays - Indicator Details:
Index Map
Editable Vector Version (SVG)
High Resolution Raster Version (JPG)
Station Data Download (Excel)
This map illustrates the overall Coastal Bays Health Index (CBHI) scores for each of the six reporting regions. In 2009, Sinepuxent Bay had the highest health index score of all reporting regions yet was still in the good as opposed to the very good category. Moderate CBHI scores were calculated for the remaining eastern reporting regions, whereas the lowest index scores resulted in poor grades for the westernmost tributaries of St. Martin River and Newport Bay.
This map illustrates the overall Coastal Bays Health Index (CBHI) scores for each of the six reporting regions.
Ranking
Comparison of Bay Health Index scores for 2009 (
) compared to (
)| Score (%) | |
| 0 20 40 60 80 100 |
| Sinepuxent Bay | |
| Chincoteague Bay | |
| Overall Coastal Bays | |
| Isle of Wight Bay | |
| Assawoman Bay | |
| St. Martin River | |
| Newport Bay |
This figure ranks each region from best to worst for the Coastal Bays Health Index (CBHI). The Sinepuxent Bay region had the highest CBHI score, followed in descending order by Chincoteague, Isle of Wight, and Assawoman Bays. Regions with the lowest index scores were St. Martin River and Newport Bay, and these scores were similar.
Excel Spreadsheet