| Farmstead | EPA # 0612110 | ||||||||
| Inorganic Contaminants | Date(s) Collected | Highest Detect | Range Detected | MCL or MRDL | MCLG or MRDLG | Violation Yes/No | Typical Source of Contaminant | ||
| Arsenic (ppb) | 1/26/10 4/29/10 7/27/10 10/28/10 | 6 RAA=4.2 | 2 - 6 | 10 | N/A | No | Erosion of natural deposits; runoff from orchards; runoff from glass and electronics production wastes. | ||
| Arsenic: While your drinking water meets EPA’s standard for arsenic, it does contain low levels of arsenic. EPA’s standard balances the current understanding of arsenic’s possible health effects against the cost of removing arsenic from drinking water. EPA continues to research the health effects of low levels of arsenic which is a mineral know to cause cancer in humans at high concentrations and is linked to other health effects such as skin damage and circulatory problems. | |||||||||
| Barium (ppm) | 12/2/09 | 0.018 | N/A | 2 | 2 | No | Erosion of natural deposits | ||
| Fluoride (ppm) | 12/2/09 | 0.48 | N/A | 4 | 4 | No | Erosion of natural deposits | ||
| Sodium (ppm) | 12/2/09 | 21.5 | N/A | Not Regulated | N/A | Natural sources; runoff from use as salt on roadways; by-product of treatment process | |||
| Volatile Organic Contaminants | |||||||||
| Chlorine (ppm) | 2010 | 0.43 Avg | 0.1 - 0.7 | 4 | 4 | No | Water additive used to control microbes | ||
| Total Trihalomethanes (ppb) | 8/9/10 | 5.7 | N/A | 80 | 0 | No | By-product of drinking water chlorination | ||
| Radiological Contaminants | |||||||||
| Compliance Gross Alpha (pCi/L) | 2005 | 2.3 | 1.8 - 2.3 | 15 | 0 | No | Erosion of natural deposits | ||
| Radium 226 & 228 (pCi/L) | 2005 | 2.3 | 1.2 - 2.3 | 5 | 0 | No | Erosion of natural deposits | ||
| Uranium (ppb) | 2005 | 1.8 | 0.9 - 1.8 | 30 | 0 | No | Erosion of natural deposits | ||
| Radon (pCi/L) | 4/20/10 | 2,520 | N/A | Not Regulated | N/A | Erosion of natural deposits | |||
| Date(s) Collected | 90th Percentile | Action Level | MCLG | # of Sites Sampled | # Sites Above Action Level | Violation Yes/No | Typical Source of Contaminant | ||
| Lead (ppb) | 4/15/09 | < 5 | 15 | 0 | 9 | 0 | No | Corrosion of household plumbing system | |
| Copper (ppm) | 4/15/09 | 0.245 | 1.3 | 1.3 | 9 | 0 | No | Corrosion of household plumbing system | |
| What is the source of my drinking water? | |||||||||
| The source of the Farmstead water supply is the Farmstead Well and Pump House located on Senter Cove Road in Derry, NH. The well is located 170' north of the pump house. Treatment consists of chlorination for disinfection, arsenic removal filters, and the addition of a blended phosphate for corrosion control and sequestration of iron and manganese. | |||||||||
| Source Water Assessment Summary | |||||||||
| Summary of Susceptibility Factors | |||||||||
| Source Name | Date | Low | Med | High | |||||
| Bedrock Well # 1 | 3/18/02 | 8 | 0 | 4 | |||||
| The complete Assessment Report is available for review. For more information call Gary Tetley at 800-553-5191 ext. 2378 or visit NH Department of Environmental Services Drinking Water and Groundwater Bureau web site at http://www.des.nh.gov/organization/divisions/water/dwgb/dwspp/reports/index.htm | |||||||||