Maine Healthy Beaches Portal

Water Quality Monitoring and Beach Status

Beach Monitoring Season is from Memorial Day to Labor Day

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Table

Water Quality Monitoring Data

Mackerel Cove

Maine's Beach Action Value (BAV or safety threshold) for Enterococcus bacteria in marine waters is 104 MPN/100mL.

Site Name Date Collected Enterococcus (MPN/100mL)
HARP-3
05/29/2024
10
HARP-3
06/05/2024
10
HARP-3
06/12/2024
< 10
HARP-3
06/20/2024
10
HARP-3
06/26/2024
< 10
HARP-3
07/01/2024
< 10
HARP-3
07/10/2024
< 10
HARP-3
07/17/2024
20
HARP-3
07/24/2024
85
HARP-3
07/25/2024
10
HARP-3
07/31/2024
213
HARP-3
08/01/2024
31
HARP-3
08/07/2024
63
HARP-3
08/08/2024
< 10
HARP-3
08/14/2024
< 10
HARP-3
08/21/2024
395
HARP-3
08/22/2024
245
HARP-3
08/28/2024
20
HARP-3
05/28/2025
96
HARP-3
05/29/2025
< 10
HARP-3
06/04/2025
< 10
HARP-3
06/11/2025
20
HARP-3
06/16/2025
30
HARP-3
06/25/2025
10
HARP-3
07/02/2025
52
HARP-3
07/09/2025
10
HARP-3
07/16/2025
10
HARP-3
07/23/2025
10
HARP-3
07/30/2025
< 10
HARP-3
08/06/2025
10
HARP-3
08/13/2025
< 10
HARP-3
08/20/2025
< 10
HARP-3
08/27/2025
< 10
HARP-3
06/01/2022
< 10
HARP-3
06/08/2022
63
HARP-3
06/15/2022
120
HARP-3
06/16/2022
121
HARP-3
06/22/2022
10
HARP-3
06/29/2022
20
HARP-3
07/06/2022
52
HARP-3
07/13/2022
20
HARP-3
07/20/2022
10
HARP-3
07/27/2022
41
HARP-3
08/03/2022
31
HARP-3
08/10/2022
10
HARP-3
08/17/2022
< 10
HARP-3
08/24/2022
31
HARP-3
08/31/2022
63
HARP-3
05/31/2023
< 10
HARP-3
06/07/2023
20
HARP-3
06/14/2023
10
HARP-3
06/21/2023
< 10
HARP-3
06/28/2023
52
HARP-3
07/05/2023
175
HARP-3
07/06/2023
85
HARP-3
07/12/2023
41
HARP-3
07/19/2023
< 10
HARP-3
07/26/2023
< 10
HARP-3
08/02/2023
10
HARP-3
08/09/2023
31
HARP-3
08/16/2023
75
HARP-3
08/23/2023
< 10
HARP-3
08/30/2023
10
HARP-3
06/03/2020
70
HARP-3
06/10/2020
< 10
HARP-3
06/17/2020
10
HARP-3
06/24/2020
10
HARP-3
07/01/2020
121
HARP-3
07/08/2020
41
HARP-3
07/15/2020
< 10
HARP-3
07/22/2020
< 10
HARP-3
07/29/2020
52
HARP-3
08/05/2020
203
HARP-3
08/06/2020
20
HARP-3
08/12/2020
10
HARP-3
08/19/2020
52
HARP-3
08/26/2020
10
HARP-3
09/02/2020
187
HARP-3
06/02/2021
30
HARP-3
06/09/2021
10
HARP-3
06/16/2021
< 10
HARP-3
06/23/2021
20
HARP-3
06/30/2021
< 10
HARP-3
07/07/2021
31
HARP-3
07/14/2021
74
HARP-3
07/21/2021
158
HARP-3
07/28/2021
20
HARP-3
08/04/2021
10
HARP-3
08/11/2021
52
HARP-3
08/18/2021
86
HARP-3
08/19/2021
20
HARP-3
08/25/2021
41
HARP-3
09/01/2021
< 10
HARP-3
06/03/2026
< 10
HARP-3
06/17/2026
495
HARP-3
06/24/2026
< 10
HARP-3
07/01/2026
30
HARP-3
07/15/2026
52
HARP-3
07/29/2026
< 10
HARP-3
08/12/2026
< 10
HARP-3
08/26/2026
31

Download Data: Water quality data are available for download using the buttons below. This download will include date collected, time collected, Enterococcus, salinity, water temperature, and air temperature.

Download Excel   Download CSV   Download XML

*MHB's water quality data are provided in real-time and are subject to revision. This season’s data are preliminary and have not received final quality assurance/quality control (QA/QC) review.