Grays Inn Creek

Rock Hall, Maryland

Grays Inn Creek is a major tidal tributary of the Lower Chester River near Rock Hall, Maryland. There are several marinas and protected waters for safe anchorage. CRA samples for bacteria near the fork of Grays Inn Creek and Herringtown Creek.

WATER QUALITY
  • Passed water quality tests at least 95% of the time
  • Historical Status
  • This status is based on the latest sample, taken on . ​Chester River Association​ updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on at
For water quality icon legend, click:   
MONITORING FREQUENCY

Grays Inn Creek is sampled bi-weekly from May 20th to September 10th

SOURCE INFORMATION

The Chester River Association samples locations every other Wednesday from the week before Memorial Day through Labor Day. Samples results are generally reported on Thursdays and Swim Guide is updated as soon as possible to reflect the latest results.

Samples are measured for Entroccoci bacteria, which serve as an indicator bacteria for pathogens in the water. Analysis is performed by CRA staff at Washington College using the IDEXX Enterolert procedure (https://www.idexx.com/water/products/enterolert.html).

The Environmental Protection Agency has set a threshold of 104 colony forming units per 100 milliliters (cfu/100ml) as the single test limit for weekly testing. Samples recording less than 104 cfu/100ml are therefore considered acceptable levels for swimming and water contact. Samples recording 104 cfu/100ml or greater are considered unacceptable for swimming and water contact due to the increased risk of illness.

It is advised that after a rainfall, all Chester River beaches are under a no swimming/no direct water contact advisory for 48 hours due to predicted elevated bacteria levels from rainwater runoff and increased health risks.

The Chester River Association's mission is to achieve a healthy Chester River for our community and future generations through restoration, outreach, and advocacy.

WATER QUALITY GRAPH

Grays Inn Creek

Rock Hall, Maryland

WATER QUALITY
  • Passed water quality tests at least 95% of the time
  • Historical Status
  • This status is based on the latest sample, taken on . ​Chester River Association​ updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on at
For water quality icon legend, click:   

Grays Inn Creek is a major tidal tributary of the Lower Chester River near Rock Hall, Maryland. There are several marinas and protected waters for safe anchorage. CRA samples for bacteria near the fork of Grays Inn Creek and Herringtown Creek.

MONITORING FREQUENCY

Grays Inn Creek is sampled bi-weekly from May 20th to September 10th

SOURCE INFORMATION

The Chester River Association samples locations every other Wednesday from the week before Memorial Day through Labor Day. Samples results are generally reported on Thursdays and Swim Guide is updated as soon as possible to reflect the latest results.

Samples are measured for Entroccoci bacteria, which serve as an indicator bacteria for pathogens in the water. Analysis is performed by CRA staff at Washington College using the IDEXX Enterolert procedure (https://www.idexx.com/water/products/enterolert.html).

The Environmental Protection Agency has set a threshold of 104 colony forming units per 100 milliliters (cfu/100ml) as the single test limit for weekly testing. Samples recording less than 104 cfu/100ml are therefore considered acceptable levels for swimming and water contact. Samples recording 104 cfu/100ml or greater are considered unacceptable for swimming and water contact due to the increased risk of illness.

It is advised that after a rainfall, all Chester River beaches are under a no swimming/no direct water contact advisory for 48 hours due to predicted elevated bacteria levels from rainwater runoff and increased health risks.

The Chester River Association's mission is to achieve a healthy Chester River for our community and future generations through restoration, outreach, and advocacy.

WATER QUALITY GRAPH



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