Current Conditions Yearly Table View
| Select a Year, Sampling Location, and Parameter: | ||
|---|---|---|
2021 Chesapeake Bay Mainstem - Bottom Dissolved Oxygen (mg/L)
Click on hyperlinked stations to view charts of water quality trends.
| Stations | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CB1.0 - Susquehanna River | 12.7 | 13.5 | 13.3 | 11.7 | 10.8 | 8.5 | 7.7 | 9 | ||||
| CB1.1 - Susquehanna River | 13.6 | 13.7 | - | 11.5 | 10.8 | 6.65 | 6.65 | 7.45 | ||||
| CB2.1 - Turkey Point | 13.1 | 13.7 | 12.3 | 11.7 | 9.4 | 7.65 | 7.5 | 7.3 | ||||
| CB2.2 - Still Pond | 11.7 | 12.8 | 8.6 | 8.2 | 6.5 | 6.3 | 6.15 | 4.3 | ||||
| CB3.1 - Gunpowder Neck | 9.9 | 10.8 | 6.2 | 6 | 1.9 | 1.7 | 3.15 | 1.13 | ||||
| CB3.2 - Swan Point | 9.2 | 10 | 6.2 | 5.5 | 1.3 | 0.83 | 0.77 | 0.31 | ||||
| CB3.3W - Bay Bridge (NW) | - | 6.9 | 8.1 | 4.1 | 4.2 | 3.55 | ||||||
| CB3.3E - Bay Bridge (NE) | - | 8.9 | 6.3 | 5.45 | 5.85 | 1.88 | ||||||
| CB3.3C - Bay Bridge | 9.3 | 10 | 9.4 | 6.1 | 0.66 | 0.36 | 0.16 | 0.11 | ||||
| CB4.1C - Kent Point (SW) | 9.7 | 10.3 | 9.5 | 6.2 | 0.84 | 0.6 | 0.15 | 0.11 | ||||
| CB4.1E - Kent Point (S) | - | 6.3 | 1 | 0.55 | 0.17 | 0.12 | ||||||
| CB4.1W - Horseshoe Point | - | 8.3 | 9.2 | 4.7 | 3.2 | 2.59 | ||||||
| CB4.2E - Tilghman Island | - | 9.9 | 7.8 | 4.7 | 6.4 | 1.6 | ||||||
| CB4.2C - MD Mid Bay | 9.9 | 10.3 | 9.7 | 6.3 | 1.8 | 0.9 | 0.17 | 0.12 | ||||
| CB4.2W - Plum Point | - | 10.6 | 9.6 | 5.45 | 0.68 | 5.15 | ||||||
| CB4.3W - Dares Beach | - | 11.4 | 9.7 | 4.55 | 1.7 | 5.5 | ||||||
| CB4.3E - Mouth of Choptank River | - | 7 | 3.2 | 0.94 | 0.95 | 0.13 | ||||||
| CB4.3C - Dares Beach | 9.8 | 10.4 | 9.9 | 6.5 | 2.7 | 1.09 | 0.11 | 0.14 | ||||
| CB4.4 - Cove Point | 10.2 | 10.5 | 10 | 7.1 | 3.5 | 1.6 | 0.13 | 0.16 | ||||
| CB5.1W - Mouth of Patuxent River | 9.6 | 12 | 12.4 | 8.6 | 9.2 | 7.2 | 4.8 | 2.2 | ||||
| CB5.1 - Cedar Point | 10.2 | 10.4 | 10.2 | 7.2 | 2.3 | 2.05 | 0.13 | 0.38 | ||||
| CB5.2 - Point No Point | 10.3 | 10.2 | 10.4 | 7.5 | 5.6 | 2.55 | 0.22 | 0.56 | ||||
| CB5.3 - Smith Point | 10.5 | 10.1 | 10.7 | 9.4 | 6.6 | 4.3 | 1.65 | 0.93 |
| Bottom Dissolved Oxygen (mg/l) | |
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0.0 - 0.2 (anoxia - kills most life) |
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0.2 - 2.0 (hypoxia - harms bottom organisms) |
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2.0 - 3.0 (stresses smaller fish and crabs) |
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3.0 - 5.0 (stresses larger fish) |
 |
5.0 - 10.0 (healthy) |
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10.0 + (could indicate an algal bloom in summer) |
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No Data |
| Dissolved oxygen (DO) in the water sustains life for Bay organisms. Nutrients, such as nitrogen and phosphorus, from agricultural, sewer/septic and urban sources can fuel algal blooms that can starve the water of DO. DO levels above 5 mg/l are normally sufficient to support most life. More info on: "Our Monitoring Explained" |
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