Spring Branch
Water Monitoring
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About
This page provides the Timonium community with reliable data that you can trust. From storm info to water updates, we will fill you in with all you need to know about Spring Branch. The data we give is tested at each bridge over Spring Branch to provide data based on water flowing into the stream. New data every Saturday. Please note that data may fluctuate depending on your location.
This week's summary
High levels of trash buildup. Waters are not clear. Chemical pollution present in result of Nitrate and Alkalinity input. Swimming, wading and other water-based activities are not safe.
Spring Branch has high water hardness due to natural nutrient input. This does not affect water safety.
Water quality
Test
Detects
E. coli / Coliform
Fecal contamination; germs
Nitrates
Fertilizer runoff; pollution
Hardness
Calcium and magnesium
pH
Acidity/alkalinity balance
Alkalinity
Water stability; buffering
Chlorine
Chemical contamination
Turbidity
Cloudiness; sediment; runoff
Results
Safety rating
Last tested
--
--
Never
10 ppm
Bad | Okay | Good | Great
09/26/2026
425 ppm
Bad | Okay | Good | Great
09/26/2026
8.0
Bad | Okay | Good | Great
09/26/2026
120 ppm
Bad | Okay | Good | Great
09/26/2026
0.0 ppm
3 of 5
Bad | Okay | Good | Great
09/26/2026
Bad | Okay | Good | Great
09/26/2026
Test
Detects
E. coli / Coliform
Fecal contamination; germs
Nitrates
Fertilizer runoff; pollution
Hardness
Calcium and magnesium
pH
Acidity/alkalinity balance
Alkalinity
Water stability; buffering
Chlorine
Chemical contamination
Turbidity
Cloudiness; sediment; runoff
Results
Safety rating
Last tested
--
--
Never
10 ppm
Bad | Okay | Good | Great
09/26/2026
425 ppm
Bad | Okay | Good | Great
09/26/2026
8.5
Bad | Okay | Good | Great
09/26/2026
360 ppm
Bad | Okay | Good | Great
09/26/2026
0 ppm
Bad | Okay | Good | Great
09/26/2026
5 of 5
Bad | Okay | Good | Great
09/26/2026
Test
Detects
E. coli / Coliform
Fecal contamination; germs
Nitrates
Fertilizer runoff; pollution
Hardness
Calcium and magnesium
pH
Acidity/alkalinity balance
Alkalinity
Water stability; buffering
Chlorine
Chemical contamination
Turbidity
Cloudiness; sediment; runoff
Results
Safety rating
Last tested
--
--
Never
10 ppm
Bad | Okay | Good | Great
09/26/2026
425 ppm
Bad | Okay | Good | Great
09/26/2026
8.0
Bad | Okay | Good | Great
09/26/2026
120 ppm
Bad | Okay | Good | Great
09/26/2026
0.0 ppm
Bad | Okay | Good | Great
09/26/2026
5 of 5
Bad | Okay | Good | Great
09/26/2026