| Hubbard Hill | EPA # 0612090 | ||||||||
| Microbiological Contaminants | Highest # Positive in a month | MCL | MCLG | Violation Yes/No | Typical Source of Contaminant | ||||
| Total Coliform Bacteria | 1 in November | 1 | 0 | No | Naturally present in the environment | ||||
| Inorganic Contaminants | Date(s) Collected | Highest Detect | Range Detected | MCL or MRDL | MCLG or MRDLG | Violation Yes/No | Typical Source of Contaminant | ||
| Fluoride (ppm) | 11/5/08 | 0.88 | N/A | 4 | 4 | No | Erosion of natural deposits | ||
| Mercury (ppb) | 11/5/08 | 0.4 | N/A | 2 | 2 | No | Erosion of natural deposits; discharge from refineries and factories; runoff from landfills; runoff from cropland | ||
| Sodium (ppm) | 11/5/08 | 27.8 | 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 | 0.3 Avg | nd - 0.6 | 4 | 4 | No | Water additive used to control microbes | ||
| Total Trihalomethanes (ppb) | 8/17/10 | 3.7 | N/A | 80 | 0 | No | By-product of drinking water chlorination | ||
| Radiological Contaminants | |||||||||
| Compliance Gross Alpha (pCi/L) | 1/11/06 5/4/06 9/27/06 12/4/06 | 3.3 | nd - 3.3 | 15 | 0 | No | Erosion of natural deposits | ||
| Radium 226 & 228 (pCi/L) | 1/11/06 5/4/06 9/27/06 12/4/06 | 1.0 | nd - 1.0 | 5 | 0 | No | Erosion of natural deposits | ||
| Uranium (ppb) | 1/11/06 5/4/06 9/27/06 12/4/06 | 4.6 | 2.4 - 4.6 | 30 | 0 | No | Erosion of natural deposits | ||
| Radon (pCi/L) | 4/20/10 | 777 | 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) | 2010 | 11 | 15 | 0 | 10 | 1 | No | Corrosion of household plumbing system | |
| Copper (ppm) | 2010 | 0.251 | 1.3 | 1.3 | 10 | 0 | No | Corrosion of household plumbing system | |
| What is the source of my drinking water? | |||||||||
| The sources of the Hubbard Hill water supply is one well located off Hubbard Hill Road in Derry, NH. Well # 2 is located 75 feet north of the pump house. Treatment consists of chlorine addition for disinfection and pH adjustment using sodium hydroxide to control corrosion. | |||||||||
| VIOLATION - Monitoring and Reporting - Due to a clerical error we failed to collect four bacteria samples in December 2010. Those four samples were taken on January 19, 2011. The results of all four samples taken in January and the one sample taken on December 14, 2010 showed no presence of bacteria. | |||||||||
| Source Water Assessment Summary | |||||||||
| Summary of Susceptibility Factors | |||||||||
| Source Name | Date | Low | Med | High | |||||
| Bedrock Well # 2 | 11/6/07 | 10 | 2 | 0 | |||||
| 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 | |||||||||