Chemical water quality standards for hot tubs and spas
Minimum | Ideal | Maximum | |
Free chlorine residual (parts per million (ppm)) | 2.0 | 3.0-5.0 | 10.0 |
Combined chlorine (ppm) | None | None | 0.2 |
Bromine (ppm) | 2.0 | 4.0-6.0 | 10.0 |
pH | 7.2 | 7.4-7.6 | 7.8 |
N.J. Admin. Code Tit. 8, ch. 26, app D