Section Env-Dw 405.14 - Sanitary Protective Area and Permitted Production Volume for Groundwater Sources(a) To protect the long-term quality of each public water system, a sanitary protective area shall be established around each groundwater source and a permitted production volume shall be assigned to the source based on the size of the sanitary protective area established. The sanitary protective area shall be a circle with a specified radius, centered on the well.(b) The sanitary protective area for small community water systems shall be in accordance with Env-Dw 301 or Env-Dw 302.(c) The total permitted production volume shall be at least equal to the required source capacity based on a 24-hour period defined by the pumping test in accordance with Env-Dw 405.15.(d) The sanitary protective area shall be based on the permitted production volume established by the system, as specified in Table 405-2, below: Table 405-2: Sanitary Protective Area
| Permitted Production Volume (gpd) | Sanitary Protective Radius Length (ft.) |
| 0 - 750 | 75 |
| 751 - 1440 | 100 |
| 1441 - 4320 | 125 |
| 4321 - 14,400 | 150 |
| 14,401 - 28,800 | 175 |
| 28,801 - 57,600 | 200 |
| 57,601 - 86,400 | 250 |
| 86,401 - 115,200 | 300 |
| 115,201 - 144,000 | 350 |
| Greater than 144,000 | 400 |
(e) When more than one well is inside the sanitary protective area of another well, the individual sanitary protective areas for these wells shall be based on the combined permitted production volume of the wells unless the applicant demonstrates through hydrogeological means that the wells are not interconnected.(f) Land use within the sanitary protective area for small community water systems shall be in accordance with Env-Dw 301 or Env-Dw 302.N.H. Admin. Code § Env-Dw 405.14
(See Revision Note at part heading for Env-Dw 405) #10612, eff 6-1-14