Section Env-Dw 502.14 - Classification of Water Treatment Systems(a) Treatment systems shall be classified into 5 grades based on the complexity of the treatment processes at the system, ranging from grade I-A, the least complex, to grade IV, the most complex.(b) Treatment system grade shall be determined by summing the points of the treatment processes as assigned under Env-Dw 502.12 and then using Table 502-3, below: Table 502-3: Grades of Water Treatment Plant Complexity
Grade | Point Total | Other Limitations |
I-A | < 16 | CWS serving <500 people or having < 200 service connections, without fire protection |
I-A | < 16 | NTNC without fire protection |
I | 0-30 | Excluding I-A systems |
II | 31-55 | None |
III | 56-75 | None |
IV | >=76 | None |
(c) For purposes of certification, a groundwater source with no treatment whatsoever shall be considered to be a distribution system and not a treatment plant.(d) For any water system having multiple treatment facilities in different locations, each location or facility shall be graded independently and the highest grade shall be the classification for the overall system.(e) Each treatment process shall have points assigned only once. If a process could be classified under more than one factor and the factors have different points, the higher point value shall be used.N.H. Admin. Code § Env-Dw 502.14
(See Revision Note at part heading for Env-Dw 502) #9410, eff 3-12-09 (formerly Env-Ws 367.10 )
Amended by Volume XXXVII Number 37, Filed September 14, 2017, Proposed by #12363, Effective 8/19/2017, Expires 8/19/2027.