MANCHESTER, NH – In accordance with NH RSA 485-A, Class B waters, those acceptable for fishing, swimming and other recreational purposes, shall not have greater than an average of 88 Escherichia coli (E-coli) per 100 milliliters of water.
When water sample results are greater than an average of 88 E-coli per 100 milliliters, the Manchester Health Department may close the area to swimming until the levels are acceptable. We have listed the current E-coli per 100 milliliter reading below the image of the Natural Bathing location.
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| Camp Carpenter Collection Date 7-6-2020 E. Coli per 100 ml Lake Right Side: 1 Lake Left Side: 1 |
Crystal Lake – Melody Pines Collection Date: 7-6-2020 E. Coli per 100 ml Lake Right Side: 1 Lake Left Side: 2 |
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| Crystal Lake – Public Beach Collection Date 7-6-2020 E. Coli per 100 ml Lake Right Side: 2 Lake Left Side: 16 |
Merrimack River – Arms Park Collection Date 7-6-2020 E. Coli per 100 m Single Sample: 40 |
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| Merrimack River – Fisher Cat Ramp Collection Date 7-6-2020 E. Coli per 100 ml Single Sample: 111 |
Merrimack River – Chauncy Ave. Collection Date 7-6-2020 E. Coli per 100 ml Lake North Side: 52 Lake South Side: 46 |
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| Merrimack River – Front Street Collection Date 7-6-2020 E. Coli per 100 ml: Single Sample: 39 |
Piscataquog River – Boat Launch/Trestle Collection Date 7-6-2020 E. Coli per 100 ml Single Sample: 3 |
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| Piscataquog River – Upland Street Beach Collection Date 7-6-2020 E. Coli per 100 ml Lake Right Side: 6 Lake Left Side: 5 |
Piscatoquog River – West Side Arena Bridge Collection Date 7-6-2020 E. Coli per 100 ml Single Sample: 52 |
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| Raco Theodore Park – Piscataquog River Collection Date 7-6-2020 E. Coli per 100 ml Single Sample: 63 |
Piscatoquog River – Bass Island Collection Date 7-6-2020 E. Coli per 100 ml Single Sample: 75 |
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| Merrimack River – Fisher Cat CSO Collection Date 7-6-2020 E. Coli per 100 ml: >2420 |
Merrimack River Amoskeag Falls Marina No longer Testing |