| The source of the Cabot Preserve water supply is an interconnection with the Town of Merrimack. The Town of Merrimack operates seven wells located in Merrimack and Hollis. | |||||||||
| CABOT PRESERVE | |||||||||
| EPA # 0192070 | |||||||||
| Inorganic Contaminants | Units | MCLG | MCL | Level Detected | Violation Yes/No | Typical Source of Contaminant | |||
| Arsenic | ppb | 0 | 10 | 1 | NO | Erosion of natural deposits | |||
| Fluoride | ppm | 4 | 4 | 0.1 | NO | Erosion of natural deposits | |||
| Nitrate as Nitrogen | ppm | 10 | 10 | 1.66 | NO | Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits. | |||
| Radiological Contaminants | Units | MCLG | MCL | Level Detected | Violation Yes/No | Typical Source of Contaminant | |||
| Radon | pCi/L | Not Regulated | 1,285 | n/a | Erosion of natural deposits | ||||
| Radon is a radioactive gas that you can't see, taste or smell. It can move up through the ground and into a home through cracks and holes in the foundation. Radon can also get into indoor air when released from tap water from showering, washing dishes, and other household activities. It is a known human carcinogen. Breathing radon can lead to lung cancer. Drinking water containing radon may cause an increased risk of stomach cancer. Presently EPA is reviewing a standard for radon in water. | |||||||||
| Lead and Copper | Units | MCLG | AL | 90th percentile sample value | Violation Yes/No | Typical Source of Contaminant | |||
| Lead | ppb | 0 | 15 | 6 | NO | Corrosion of household plumbing system | |||
| Copper | ppm | 1.3 | 1.3 | 0.91 | NO | Corrosion of household plumbing system | |||
| Volatile Organic Contaminants | Units | MCLG | MCL | Level Detected | Violation Yes/No | Typical Source of Contaminant | |||
| Methyl-Tertiary-Butyl Ether (MtBE) | ppb | 13 | 13 | 0.8 | NO | Gasoline additive | |||
| Total Trihalomethanes (TTHMs) | ppb | 0 | 80 | 6 to 10.1 | NO | By-product of drinking water chlorination. | |||
| Haloacetic Acids (HAA5) | ppb | 0 | 60 | nd to 2 | NO | By-product of drinking water chlorination. | |||
| Volatile Organic Contaminants | Units | MRDLG | MRDL | Average Level Detected | Violation Yes/No | Typical Source of Contaminant | |||
| Chlorine | ppm | 4 | 4 | nd to 0.2 | NO | Water additive used to control microbes | |||
| Source Assessment Information | |||||||||
| Summary of Susceptibility Factors | |||||||||
| Source Name | Date | Low | Med | High | |||||
| Gravel Pack Well # 1 | 2/20/02 | 9 | 2 | 1 | |||||
| Gravel Pack Well # 3 | 2/20/02 | 9 | 2 | 1 | |||||
| Gravel Pack Well # 4 | 2/20/02 | 5 | 4 | 3 | |||||
| Gravel Pack Well # 5 | 2/20/02 | 5 | 3 | 4 | |||||
| Gravel Pack Well # 7 | 3/31/00 | 9 | 2 | 1 | |||||
| Gravel Pack Well # 8 | 2/20/02 | 9 | 2 | 1 | |||||
| Gravel Pack Well # 9 | 2/20/02 | 9 | 2 | 1 | |||||
| The complete Assessment Report is available for inspection. For more information visit NH DES's Drinking Water Source Assessment Program web site at www.des.state.nh.us/dwspp | |||||||||