Skip to Main Content

Current Conditions Yearly Table View

Select a Year, Sampling Location, and Parameter:

2022 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
CB1.1 - Susquehanna River
CB2.1 - Turkey Point
CB2.2 - Still Pond
CB3.1 - Gunpowder Neck
CB3.2 - Swan Point
CB3.3W - Bay Bridge (NW)
CB3.3E - Bay Bridge (NE)
CB3.3C - Bay Bridge
CB4.1C - Kent Point (SW)
CB4.1E - Kent Point (S)
CB4.1W - Horseshoe Point
CB4.2E - Tilghman Island
CB4.2C - MD Mid Bay
CB4.2W - Plum Point
CB4.3W - Dares Beach
CB4.3E - Mouth of Choptank River
CB4.3C - Dares Beach
CB4.4 - Cove Point
CB5.1W - Mouth of Patuxent River
CB5.1 - Cedar Point
CB5.2 - Point No Point
CB5.3 - Smith Point

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"