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 | ||||||||||
| CB1.1 - Susquehanna River | 13.6 | 13.7 | - | |||||||||
| CB2.1 - Turkey Point | 13.1 | 13.7 | 12.3 | |||||||||
| CB2.2 - Still Pond | 11.7 | 12.8 | 8.6 | |||||||||
| CB3.1 - Gunpowder Neck | 9.9 | 10.8 | 6.2 | |||||||||
| CB3.2 - Swan Point | 9.2 | 10 | 6.2 | |||||||||
| CB3.3W - Bay Bridge (NW) | - | |||||||||||
| CB3.3E - Bay Bridge (NE) | - | |||||||||||
| CB3.3C - Bay Bridge | 9.3 | 10 | 9.4 | |||||||||
| CB4.1C - Kent Point (SW) | 9.7 | 10.3 | 9.5 | |||||||||
| CB4.1E - Kent Point (S) | - | |||||||||||
| CB4.1W - Horseshoe Point | - | |||||||||||
| CB4.2E - Tilghman Island | - | |||||||||||
| CB4.2C - MD Mid Bay | 9.9 | 10.3 | 9.7 | |||||||||
| CB4.2W - Plum Point | - | |||||||||||
| CB4.3W - Dares Beach | - | |||||||||||
| CB4.3E - Mouth of Choptank River | - | |||||||||||
| CB4.3C - Dares Beach | 9.8 | 10.4 | 9.9 | |||||||||
| CB4.4 - Cove Point | 10.2 | 10.5 | 10 | |||||||||
| CB5.1W - Mouth of Patuxent River | 9.6 | 12 | 12.4 | |||||||||
| CB5.1 - Cedar Point | 10.2 | 10.4 | 10.2 | |||||||||
| CB5.2 - Point No Point | 10.3 | 10.2 | 10.4 | |||||||||
| CB5.3 - Smith Point | 10.5 | 10.1 | 10.7 |
| Bottom Dissolved Oxygen (mg/l) | |
 |
0.0 - 0.2 (anoxia - kills most life) |
 |
0.2 - 2.0 (hypoxia - harms bottom organisms) |
 |
2.0 - 3.0 (stresses smaller fish and crabs) |
 |
3.0 - 5.0 (stresses larger fish) |
 |
5.0 - 10.0 (healthy) |
 |
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" |
|