Water Quality Monitoring Data

Goose Rocks Beach - Main Beach

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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)
GR-2	05/29/2024	20
GR-2	06/03/2024	< 10
GR-2	06/05/2024	20
GR-2	06/10/2024	< 10
GR-2	06/12/2024	< 10
GR-2	06/17/2024	< 10
GR-2	06/24/2024	452
GR-2	06/26/2024	< 10
GR-2	07/01/2024	< 10
GR-2	07/08/2024	10
GR-2	07/10/2024	20
GR-2	07/15/2024	< 10
GR-2	07/17/2024	< 10
GR-2	07/22/2024	< 10
GR-2	07/24/2024	30
GR-2	07/29/2024	41
GR-2	07/31/2024	187
GR-2	08/01/2024	< 10
GR-2	08/05/2024	402
GR-2	08/07/2024	< 10
GR-2	08/12/2024	< 10
GR-2	08/14/2024	< 10
GR-2	08/19/2024	384
GR-2	08/21/2024	10
GR-2	08/26/2024	< 10
GR-2	08/28/2024	< 10
GR-2	05/28/2025	< 10
GR-2	06/02/2025	< 10
GR-2	06/04/2025	< 10
GR-2	06/09/2025	< 10
GR-2	06/11/2025	< 10
GR-2	06/16/2025	< 10
GR-2	06/23/2025	988
GR-2	06/25/2025	193
GR-2	06/26/2025	30
GR-2	06/30/2025	< 10
GR-2	07/02/2025	< 10
GR-2	07/07/2025	30
GR-2	07/09/2025	85
GR-2	07/14/2025	20
GR-2	07/16/2025	< 10
GR-2	07/21/2025	10
GR-2	07/23/2025	< 10
GR-2	07/28/2025	< 10
GR-2	07/30/2025	20
GR-2	08/04/2025	< 10
GR-2	08/06/2025	< 10
GR-2	08/11/2025	10
GR-2	08/13/2025	< 10
GR-2	08/18/2025	122
GR-2	08/20/2025	< 10
GR-2	08/25/2025	10
GR-2	08/27/2025	< 10
GR-2	06/01/2022	< 10
GR-2	06/06/2022	< 10
GR-2	06/08/2022	< 10
GR-2	06/13/2022	934
GR-2	06/15/2022	156
GR-2	06/16/2022	41
GR-2	06/20/2022	10
GR-2	06/22/2022	< 10
GR-2	06/27/2022	< 10
GR-2	06/29/2022	< 10
GR-2	07/06/2022	< 10
GR-2	07/11/2022	10
GR-2	07/13/2022	345
GR-2	07/14/2022	171
GR-2	07/18/2022	< 10
GR-2	07/20/2022	< 10
GR-2	07/25/2022	31
GR-2	07/27/2022	< 10
GR-2	08/01/2022	< 10
GR-2	08/03/2022	< 10
GR-2	08/08/2022	< 10
GR-2	08/10/2022	52
GR-2	08/15/2022	< 10
GR-2	08/17/2022	< 10
GR-2	08/22/2022	52
GR-2	08/24/2022	20
GR-2	08/29/2022	< 10
GR-2	08/31/2022	41
GR-2	09/13/2022	74
GR-2	09/26/2022	85
GR-2	05/31/2023	< 10
GR-2	06/05/2023	651
GR-2	06/07/2023	30
GR-2	06/12/2023	< 10
GR-2	06/14/2023	41
GR-2	06/21/2023	199
GR-2	06/22/2023	31
GR-2	06/26/2023	< 10
GR-2	06/28/2023	10
GR-2	07/05/2023	411
GR-2	07/06/2023	131
GR-2	07/10/2023	< 10
GR-2	07/12/2023	10
GR-2	07/17/2023	119
GR-2	07/19/2023	187
GR-2	07/20/2023	< 10
GR-2	07/24/2023	< 10
GR-2	07/26/2023	< 10
GR-2	07/31/2023	85
GR-2	08/02/2023	52
GR-2	08/07/2023	< 10
GR-2	08/09/2023	30
GR-2	08/14/2023	52
GR-2	08/16/2023	10
GR-2	08/21/2023	31
GR-2	08/23/2023	< 10
GR-2	08/28/2023	< 10
GR-2	08/30/2023	148
GR-2	08/31/2023	121
GR-2	09/05/2023	63
GR-2	06/17/2020	< 10
GR-2	06/22/2020	< 10
GR-2	06/24/2020	63
GR-2	06/29/2020	< 10
GR-2	07/01/2020	85
GR-2	07/06/2020	10
GR-2	07/08/2020	< 10
GR-2	07/13/2020	< 10
GR-2	07/15/2020	< 10
GR-2	07/20/2020	98
GR-2	07/22/2020	< 10
GR-2	07/27/2020	20
GR-2	08/03/2020	110
GR-2	08/05/2020	20
GR-2	08/10/2020	< 10
GR-2	08/12/2020	< 10
GR-2	08/17/2020	256
GR-2	08/19/2020	228
GR-2	08/20/2020	< 10
GR-2	08/24/2020	< 10
GR-2	08/26/2020	< 10
GR-2	08/31/2020	10
GR-2	09/02/2020	121
GR-2	06/02/2021	< 10
GR-2	06/08/2021	< 10
GR-2	06/09/2021	30
GR-2	06/15/2021	< 10
GR-2	06/16/2021	< 10
GR-2	06/22/2021	934
GR-2	06/23/2021	443
GR-2	06/24/2021	< 10
GR-2	06/29/2021	< 10
GR-2	06/30/2021	< 10
GR-2	07/06/2021	10
GR-2	07/07/2021	< 10
GR-2	07/13/2021	187
GR-2	07/14/2021	121
GR-2	07/15/2021	< 10
GR-2	07/20/2021	97
GR-2	07/21/2021	52
GR-2	07/27/2021	< 10
GR-2	07/28/2021	< 10
GR-2	08/03/2021	< 10
GR-2	08/04/2021	< 10
GR-2	08/10/2021	156
GR-2	08/11/2021	301
GR-2	08/12/2021	156
GR-2	08/16/2021	< 10
GR-2	08/18/2021	98
GR-2	08/24/2021	839
GR-2	08/25/2021	1396
GR-2	08/26/2021	86
GR-2	08/31/2021	< 10
GR-2	09/01/2021	< 10
GR-2	05/27/2026	52
GR-2	06/01/2026	269
GR-2	06/03/2026	41
GR-2	06/08/2026	< 10
GR-2	06/10/2026	< 10
GR-2	06/15/2026	546
GR-2	06/17/2026	108
GR-2	06/22/2026	< 10
GR-2	06/24/2026	10
GR-2	06/29/2026	20
GR-2	07/01/2026	86
GR-2	07/06/2026	< 10
GR-2	07/08/2026	< 10
GR-2	07/13/2026	< 10
GR-2	07/15/2026	148
GR-2	07/20/2026	52
GR-2	07/22/2026	10
GR-2	07/27/2026	< 10
GR-2	07/29/2026	63
GR-2	08/03/2026	< 10
GR-2	08/05/2026	< 10
GR-2	08/10/2026	20
GR-2	08/12/2026	10
GR-2	08/17/2026	< 10
GR-2	08/19/2026	10
GR-2	08/24/2026	< 10
GR-2	08/26/2026	< 10
GR-2	08/31/2026	< 10
GR-2	09/02/2026	< 10
GR-4	05/29/2024	< 10
GR-4	06/03/2024	< 10
GR-4	06/05/2024	10
GR-4	06/10/2024	< 10
GR-4	06/12/2024	< 10
GR-4	06/17/2024	< 10
GR-4	06/24/2024	52
GR-4	06/26/2024	10
GR-4	07/01/2024	< 10
GR-4	07/08/2024	< 10
GR-4	07/10/2024	< 10
GR-4	07/15/2024	< 10
GR-4	07/17/2024	< 10
GR-4	07/22/2024	< 10
GR-4	07/24/2024	160
GR-4	07/25/2024	85
GR-4	07/29/2024	< 10
GR-4	07/31/2024	41
GR-4	08/01/2024	< 10
GR-4	08/05/2024	< 10
GR-4	08/07/2024	< 10
GR-4	08/12/2024	< 10
GR-4	08/14/2024	< 10
GR-4	08/19/2024	238
GR-4	08/21/2024	20
GR-4	08/26/2024	10
GR-4	08/28/2024	< 10
GR-4	05/28/2025	< 10
GR-4	06/02/2025	< 10
GR-4	06/04/2025	10
GR-4	06/09/2025	< 10
GR-4	06/11/2025	< 10
GR-4	06/16/2025	74
GR-4	06/23/2025	106
GR-4	06/25/2025	< 10
GR-4	06/30/2025	< 10
GR-4	07/02/2025	< 10
GR-4	07/07/2025	< 10
GR-4	07/09/2025	< 10
GR-4	07/14/2025	< 10
GR-4	07/16/2025	10
GR-4	07/21/2025	97
GR-4	07/23/2025	10
GR-4	07/28/2025	< 10
GR-4	07/30/2025	< 10
GR-4	08/04/2025	< 10
GR-4	08/06/2025	< 10
GR-4	08/11/2025	146
GR-4	08/13/2025	10
GR-4	08/18/2025	< 10
GR-4	08/20/2025	20
GR-4	08/25/2025	213
GR-4	08/27/2025	10
GR-4	06/01/2022	< 10
GR-4	06/06/2022	< 10
GR-4	06/08/2022	10
GR-4	06/13/2022	< 10
GR-4	06/15/2022	183
GR-4	06/16/2022	20
GR-4	06/20/2022	< 10
GR-4	06/22/2022	< 10
GR-4	06/27/2022	20
GR-4	06/29/2022	< 10
GR-4	07/06/2022	< 10
GR-4	07/11/2022	10
GR-4	07/13/2022	10
GR-4	07/18/2022	10
GR-4	07/20/2022	< 10
GR-4	07/25/2022	20
GR-4	07/27/2022	< 10
GR-4	08/01/2022	20
GR-4	08/03/2022	< 10
GR-4	08/08/2022	< 10
GR-4	08/10/2022	62
GR-4	08/15/2022	< 10
GR-4	08/17/2022	10
GR-4	08/22/2022	< 10
GR-4	08/24/2022	< 10
GR-4	08/29/2022	< 10
GR-4	08/31/2022	< 10
GR-4	09/13/2022	85
GR-4	09/26/2022	10
GR-4	05/31/2023	10
GR-4	06/05/2023	591
GR-4	06/07/2023	20
GR-4	06/12/2023	109
GR-4	06/14/2023	31
GR-4	06/21/2023	< 10
GR-4	06/22/2023	< 10
GR-4	06/26/2023	< 10
GR-4	06/28/2023	52
GR-4	07/05/2023	350
GR-4	07/06/2023	41
GR-4	07/10/2023	20
GR-4	07/12/2023	10
GR-4	07/17/2023	< 10
GR-4	07/19/2023	< 10
GR-4	07/24/2023	< 10
GR-4	07/26/2023	< 10
GR-4	07/31/2023	31
GR-4	08/02/2023	< 10
GR-4	08/07/2023	< 10
GR-4	08/09/2023	95
GR-4	08/14/2023	< 10
GR-4	08/16/2023	< 10
GR-4	08/21/2023	< 10
GR-4	08/23/2023	< 10
GR-4	08/28/2023	84
GR-4	08/30/2023	420
GR-4	08/31/2023	74
GR-4	06/02/2021	< 10
GR-4	06/08/2021	< 10
GR-4	06/09/2021	< 10
GR-4	06/15/2021	52
GR-4	06/16/2021	< 10
GR-4	06/22/2021	31
GR-4	06/23/2021	< 10
GR-4	06/29/2021	10
GR-4	06/30/2021	< 10
GR-4	07/06/2021	< 10
GR-4	07/07/2021	< 10
GR-4	07/13/2021	10
GR-4	07/14/2021	10
GR-4	07/20/2021	< 10
GR-4	07/21/2021	31
GR-4	07/27/2021	< 10
GR-4	07/28/2021	< 10
GR-4	08/03/2021	< 10
GR-4	08/04/2021	10
GR-4	08/10/2021	31
GR-4	08/11/2021	31
GR-4	08/16/2021	< 10
GR-4	08/18/2021	< 10
GR-4	08/24/2021	10
GR-4	08/25/2021	31
GR-4	08/31/2021	< 10
GR-4	09/01/2021	< 10
GR-4	05/27/2026	10
GR-4	06/01/2026	< 10
GR-4	06/03/2026	< 10
GR-4	06/08/2026	< 10
GR-4	06/10/2026	< 10
GR-4	06/15/2026	10
GR-4	06/17/2026	10
GR-4	06/22/2026	< 10
GR-4	06/24/2026	< 10
GR-4	06/29/2026	< 10
GR-4	07/01/2026	< 10
GR-4	07/06/2026	< 10
GR-4	07/08/2026	< 10
GR-4	07/13/2026	10
GR-4	07/15/2026	< 10
GR-4	07/20/2026	< 10
GR-4	07/22/2026	< 10
GR-4	07/27/2026	< 10
GR-4	07/29/2026	< 10
GR-4	08/03/2026	< 10
GR-4	08/05/2026	< 10
GR-4	08/10/2026	< 10
GR-4	08/12/2026	< 10
GR-4	08/17/2026	10
GR-4	08/19/2026	< 10
GR-4	08/24/2026	< 10
GR-4	08/26/2026	< 10
GR-4	08/31/2026	< 10
GR-4	09/02/2026	< 10

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.

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*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.