New Hampshire Code of Administrative Rules
Env - Department of Environmental Services
Subtitle Env-Wq - Water Quality and Quantity Programs
Chapter Env-Wq 400 - GROUNDWATER PROTECTION
Part Env-Wq 402 - GROUNDWATER DISCHARGE PERMITS AND REGISTRATIONS
Section Env-Wq 402.10 - Nitrate Setbacks

Universal Citation: NH Admin Rules Env-Wq 402.10

Current through Register No. 13, March 27, 2025

(a) Minimum nitrate setback distances to property lines shall be as set forth in Table 402-1 below:

Table 402-1: Minimum Nitrate Setback Distance To Property Line

Design Flow (gpd) For each system Hydraulically Down-gradient (feet) Hydraulically Side-gradient (feet) Hydraulically Up-gradient (feet)
1,001 - 1,100 55 28 14
1,101 - 1,200 60 30 15
1,201 - 1,300 65 33 17
1,301 - 1,400 70 35 18
1,401 - 1,500 75 38 19
1,501 - 1,600 80 40 20
1,601 - 1,700 85 43 22
1,701 - 1,800 90 45 23
1,801 - 1,900 95 48 24
1,901 - 2,000 100 50 25
2,001 - 2,100 105 53 27
2,101 - 2,200 110 55 28
2,201 - 2,300 115 58 29
2,301 - 2,400 120 60 30
2,401 - 2,500 125 63 32
2,501 - 3,000 150 75 37
3,001 - 3,500 175 88 44
3,501 - 4,000 200 100 50
4,001 - 4,500 225 113 57
4,501 - 5,000 250 125 63
5,001 - 6,000 275 138 69
6,001 - 7,000 300 150 75
7,001 - 8,000 320 160 80
8,001 - 9,000 340 170 85
9,001 - 10,000 350 175 88
10,001 - 15,000 435 213 107
15,001 - 19,999 500 250 125

(b) Any discharge of wastewater from a nursing home or medical care facility shall meet the minimum nitrate setback distances established in Table 402-1, regardless of whether a groundwater discharge permit is needed or not.

(See Revision Note at part heading for Env-Wq 402) #8955, eff 7-26-07

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