Updated 2026-07-13
New Hampshire beach water quality
New Hampshire has 17 public beaches in the EPA monitoring dataset, 14 of them with enough bacteria samples to grade. 2 earn an A for consistently clean water. Full ranking below.
A 2
B 3
C 5
D 4
F 0
| Grade | Beach | County | % over limit | Samples | Advisory |
|---|---|---|---|---|---|
| A | Seabrook Town Beach | Rockingham | 0% | 51 | Excellent |
| A | Sawyer Beach | Rockingham | 0% | 36 | Excellent |
| B | Wallis Sands State Park | Rockingham | 4.4% | 270 | Good |
| B | Foss Beach | Rockingham | 6.5% | 46 | Good |
| B | Hampton Beach State Park | Rockingham | 7% | 201 | Good |
| C | North Beach | Rockingham | 7.8% | 128 | Fair |
| C | Hampton Harbor Beach | Rockingham | 8.8% | 181 | Fair |
| C | Bass Beach | Rockingham | 11% | 73 | Fair |
| C | Northside Park | Rockingham | 11.2% | 214 | Fair |
| C | Jenness State Beach | Rockingham | 11.7% | 205 | Fair |
| D | New Castle Town Beach | Rockingham | 13.7% | 270 | Poor |
| D | Wallis Sands Beach At Wallis Road | Rockingham | 14.2% | 127 | Poor |
| D | Jenness Beach At Cable Road | Rockingham | 16.5% | 79 | Poor |
| D | North Hampton State Beach | Rockingham | 20.2% | 99 | Poor |
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