Current Conditions Yearly Table View
| Select a Year, Sampling Location, and Parameter: | ||
|---|---|---|
2023 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 | 13.4 | 13 | 12.7 | 10.8 | - | 9.8 | 8 | 8.5 | ||||
| CB1.1 - Susquehanna River | 12.5 | 13.4 | 12.8 | 11 | 8.9 | 6.85 | 7.25 | 7.05 | ||||
| CB2.1 - Turkey Point | 12.2 | 12.9 | 12.5 | 10.7 | 9.3 | 6.95 | 6.8 | 6.95 | ||||
| CB2.2 - Still Pond | 10.5 | 11.3 | 9 | 9.1 | 6.6 | 6.2 | 5 | 4.7 | ||||
| CB3.1 - Gunpowder Neck | 8.9 | 8.1 | 6.4 | 3.3 | 2.6 | 2.65 | 0.95 | 3.75 | ||||
| CB3.2 - Swan Point | 8.5 | 7.4 | 5.9 | 5.1 | 1.9 | 1.65 | 0.35 | 3.4 | ||||
| CB3.3W - Bay Bridge (NW) | 7.3 | 5.7 | 2.5 | 6.25 | 4.1 | 3.95 | ||||||
| CB3.3E - Bay Bridge (NE) | 10.1 | 7.8 | 4.5 | 6.65 | 3.25 | 6.4 | ||||||
| CB3.3C - Bay Bridge | 6.8 | 7.4 | 6.3 | 5.3 | 2.6 | 1.1 | 0.34 | 0.3 | ||||
| CB4.1C - Kent Point (SW) | 7 | 8.1 | 7.1 | 6 | 3.1 | 0.9 | 0.3 | 0.2 | ||||
| CB4.1E - Kent Point (S) | 6.1 | 6.5 | 2.7 | 1.25 | 0.38 | 1.4 | ||||||
| CB4.1W - Horseshoe Point | 10.4 | 6.9 | 3.8 | 3.4 | 2.55 | 5.45 | ||||||
| CB4.2E - Tilghman Island | 10.6 | 9.2 | 7.3 | 6.4 | 4.5 | 5.4 | ||||||
| CB4.2C - MD Mid Bay | 7.8 | 8.2 | 8.4 | 6.2 | 3.3 | 1.25 | 0.57 | 0.2 | ||||
| CB4.2W - Plum Point | 10.9 | 8.1 | 5.2 | 2.95 | 3.3 | 5.95 | ||||||
| CB4.3W - Dares Beach | 10.7 | 8.6 | 4.6 | 2.65 | 3.7 | 4.85 | ||||||
| CB4.3E - Mouth of Choptank River | 7.1 | 6.3 | 3.3 | 1.5 | 0.4 | 0.4 | ||||||
| CB4.3C - Dares Beach | 8.5 | 8.2 | 8.4 | 6.4 | 3.5 | 1.6 | 0.6 | 0.25 | ||||
| CB4.4 - Cove Point | 8.5 | 9.6 | 7.6 | 6.7 | 4 | 2 | 0.75 | 0.3 | ||||
| CB5.1W - Mouth of Patuxent River | 10.2 | 10.8 | 11 | 9.2 | 3.9 | - | 2 | 3.7 | ||||
| CB5.1 - Cedar Point | 9.7 | 10 | 7.9 | 6.6 | 4.2 | 2.35 | 0.8 | 0.5 | ||||
| CB5.2 - Point No Point | 9.9 | 10.4 | 8.9 | 7 | 4.5 | 2.6 | 0.85 | 0.9 | ||||
| CB5.3 - Smith Point | 9.9 | 9.8 | 9.7 | 7.6 | 5.3 | 5.1 | 1.5 | 2.4 |
| Bottom Dissolved Oxygen (mg/l) | |
 |
0.0 - 0.2 (anoxia - kills most life) |
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0.2 - 2.0 (hypoxia - harms bottom organisms) |
 |
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) |
 |
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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