Harford County

Recreational Water Sampling Geometric Mean History


2026 Geometric Mean History

Sample Locations

Sample Taken Geometric Mean (cfu) Indicator Threshold Level:

Impact Within 24-48hrs

Kilgore Falls

5/18/26

6/1/26

6/15/26

6/29/26

7/13/26

7/27/26

8/10/26

8/24/26

8/31/26

32 cfu

41 cfu

352 cfu

 

 

 

 

 

 

E. coli 235 cfu Bathers at lower falls. No rain within 72 hours

No rain in last 72 hours, bathers and dogs

Rain

 

 

 

 

 

Wilsons Picnic Area

5/18/26

6/1/26

6/15/26

6/29/26

7/13/26

7/27/26

8/10/26

8/24/26

8/31/26

165 cfu

154 cfu

1153 cfu

 

 

 

 

 

 

E. coli

235 cfu

Bathers and trash present, water turbid, No rain within 72 hours

No rain in last 72 hours

Rain

 

 

 

 

 

Hills Grove Picnic Area

5/18/26

6/1/26

6/15/26

6/29/26

7/13/26

7/27/26

8/10/26

8/24/26

8/31/26

558 cfu

190 cfu

2121 cfu

 

 

 

 

 

 

E. coli

235 cfu

Bathers at site 1, water turbid, No rain within 72 hours

No rain in last 72 hours, dogs and bathers in water

Rain

 

 

 

 

 

Mariner Point Park

(West)

5/19/26

6/2/26

6/16/26

6/30/26

7/14/26

7/28/26

8/11/26

8/25/26

9/1/26

33 cfu

10 cfu

85 cfu

 

 

 

 

 

 

Enterococci

104 cfu

Out going tide, no rain in last 72 hours

Out going tide, no rain in last 72 hours

Outgoing tide, Rain

 

 

 

 

 

Mariner Point Park (South)

5/19/26

6/2/26

6/16/26

6/30/26

7/14/26

7/28/26

8/11/26

8/25/26

9/1/26

13 cfu

69 cfu

31 cfu

 

 

 

 

 

 

Enterococci

104 cfu

Out going tide, no rain in last 72 hours

Out going tide, no rain in last 72 hours

Outgoing tide, Rain

 

 

 

 

 

Mariner Point Park

(East)

5/19/26

6/2/26

6/16/26

6/30/26

7/14/26

7/28/26

8/11/26

8/25/26

9/1/26

25 cfu

92 cfu

460 cfu

 

 

 

 

 

 

Enterococci

104 cfu

Out going tide, no rain in last 72 hours

Out going tide, no rain in last 72 hours, film on water, possible pollen build up

Outgoing tide, Rain

 

 

 

 

 

Copenhaver Park

5/19/26

6/2/26

6/16/26

6/30/26

7/14/26

7/28/26

8/11/26

8/25/26

9/1/26

135 cfu

181 cfu

458 cfu

 

 

 

 

 

 

Enterococci

104 cfu

Low tide, no rain in last 72 hours

Out going tide, no rain in last 72 hours

Outgoing tide, Rain

 

 

 

 

 

Flying Point Park

5/19/26

6/2/26

6/16/26

6/30/26

7/14/26

7/28/26

8/11/26

8/25/26

9/1/26

42 cfu

22 cfu

32 cfu

 

 

 

 

 

 

Enterococci

104 cfu

Low tide, no rain in last 72 hours

Out going tide, no rain in last 72 hours

Outgoing tide, Rain

 

 

 

 

 

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