A cyanobacteria bloom has been observed at your lake, please see below for details.
| Waterbody | Pawtuckaway, Nottingham |
| Status | REPORT |
| Issued | 5/28/2025 |
| Bloom Description (photos attached) | Green surface accumulations along the shoreline |
| Cyanobacteria Taxa | Dolichospermum |
| Cyanobacteria Density (cells/mL) | Near Dolloff Dam: Too Numerous to Count (TNTC)
Beach Road Beach: 470,000 |
| Notes | Bloom conditions were first observed on
5/27 near the Dolloff Dam. Samples collected on 5/28 exceeded the recreational threshold at both Dolloff Dam and Beach Road Beach.
Please report through the Bloom Report Form if you continue to see bloom conditions. |
Please visit the Healthy Swimming Mapper for the most current information about bloom location, status, and severity .
Cyanobacteria reports depict only what an observer sees in the water. The report may reflect a waterbody wide perspective if they boated around the waterbody and made observations, or it could be a single sighting from the shoreline. One sighting does not indicate that a watch or warning is necessary, but it does indicate that those on or around the waterbody should be aware that cyanobacteria have been observed beyond what is natural, and that they should be on the lookout for shifting bloom conditions and report them via the Bloom Report Form.
Watches are issued when samples are evaluated and cyanobacteria are in higher abundance than normal background levels at multiple locations, but that densities are below 70,000 cells/mL or when clear photographic evidence indicates a bloom is occurring.
Warnings are issued when samples are evaluated microscopically, and cell counts exceed 70,000 cells/mL and the bloom is widespread or extends to multiple locations on the waterbody. A warning does not close the waterbody to recreational use. The warning is intended as a precautionary measure to inform the public of the potential health risks associated with cyanobacteria blooms. Please see our newly updated FAQs for more information.
NHDES advises lake users to not swim in or near the vicinity of where bloom material is visible. Please also keep pets and livestock out of areas where bloom material is observed. It is suggested that local authorities post the 2025 cyanobacteria sign at public access points while a warning is in place to alert the public of current conditions.