HANSCOM AIR FORCE BASE, Mass. -- The 2018 Annual Drinking Water Quality Report for Massachusetts Water Resource Authority, or MWRA, Lexington, Massachusetts, and Hanscom Air Force Base, Mass., Public Water System Identification, or PWSID, Number 3023002.
This report is an annual snapshot of the drinking water quality provided by Hanscom Air Force Base, Mass. Under the Consumer Confidence Reporting Rule of the Environmental Protection Agency's Safe Drinking Water Act, or SDWA, community water systems are required to report this water quality information to the consuming public annually.
Presented in this report is information on the source of our drinking water, where it comes from, its chemical composition, how its quality compares to state and federal standards and the health risks associated with any contaminants present. For those interested in an opportunity for public participation in decisions that may affect the quality of the water, please contact the personnel listed below. Meetings take place on a non-routine basis and as needed.
I. Public Water System Information
Address: Hanscom Air Force Base
Contact: Renata N. Welch, 66th Civil Engineering Division and Tech. Sgt. Ronnie McGee, Bioenvironmental Engineering
Telephone: 781-225-6142 and 781-225-6365
Water System Improvements:
The Hanscom Air Force Base water system is routinely inspected by the 66th Civil Engineering (CE) Division Utilities section and 66th Medical Squadron Bioenvironmental Engineering (BE). These two organizations inspect the system for its technical, financial and managerial capacity to provide safe drinking water to residents. To ensure the highest quality water is available and provided to residents, a Massachusetts-certified operator oversees the routine operations of the water system.
II. Drinking Water Source
The water supplied to Hanscom AFB is from the adjacent towns of Lexington and Bedford, Mass. Lexington receives its water from the Massachusetts Water Resource Authority (MWRA). Bedford also receives most of its water from MWRA, as well as a small amount from the Shawsheen Groundwater Treatment Facility.
The MWRA water comes from the Quabbin Reservoir, located about 65 miles west of Boston, and the Wachusett Reservoir, located about 35 miles west of Boston. Water is sent from the Quabbin Reservoir through the Wachusett Reservoir to 39 MetroWest and Greater Boston cities and towns, including Hanscom AFB.
Quabbin and Wachusett watersheds are protected naturally through MWRA and the Massachusetts Department of Conservation and Recreation, or DCR. More than 85 percent of the watersheds are covered in forest and wetlands that help purify the water as it flows across the land to the reservoirs. MWRA and DCR control land use and access to the watersheds. DCR patrols watersheds daily and MWRA scientists make sure the watersheds, streams and reservoirs are regularly tested.
MWRA's licensed treatment operators treat the water through a process called primary disinfection. The water chemistry is adjusted to reduce corrosion of lead and copper from home plumbing. Fluoride is also added to reduce cavities.
Since July 2005, ozone has been added to the water leaving the reservoirs to kill microorganisms that may be present. Once the water enters the main MWRA distribution system, it is treated with a mild and enduring disinfectant called chloramine. Based on acceptable levels of total chlorine from the MWRA facility, Hanscom AFB does not supplement the distribution system with any additional disinfectant. Additionally, in the event of a water emergency the Hanscom Contingency Response Plan, Annex P will be implemented to provide necessary action.
In July 2005, the John J. Carroll Water Treatment Plant started providing state-of-the-art treatment to the drinking water for the 51 communities in Eastern Massachusetts served by the MWRA. The Marlborough plant uses ozonation and chloramination to treat up to 275 million gallons of water daily, or up to 405 on a peak day.
In addition, ultraviolet light treatment began in 2014. UV light damages the DNA of bacteria, viruses and other pathogens, making it a strong disinfectant. Furthermore, UV light inactivates chemically-resistant parasites such as Cryptosporidium and Giardia. Since the plant has been online, it has exceeded the current regulatory requirements for inactivation of Giardia, provided Cryptosporidium inactivation in advance of future regulations and reduced the formation of disinfection by-products.
III. SUBSTANCE FOUND IN TAP WATER
Sources of drinking water, both tap water and bottled water, include rivers, lakes, streams, ponds, reservoirs, springs and wells. As water travels over the surface of the land or through the ground, it dissolves naturally occurring minerals, and in some cases, radioactive material. It can pick up substances both naturally in the environment and from the presence of animals or human activity.
Contaminants that may be present in source water include:
Microbial contaminants: such as viruses and bacteria, which may come from sewage treatment plants, septic systems, agricultural livestock operations or wildlife.
Inorganic contaminants: such as salts and metals, which can be naturally-occurring or result from urban stormwater runoff, industrial or domestic wastewater discharges, oil and gas production, mining or farming.
Pesticides and herbicides: that may come from a variety of sources such as agricultural or urban stormwater runoff and residential uses.
Organic chemical contaminants: including synthetic and volatile organic chemicals, which are by-products of industrial processes and petroleum production, and can come from gas stations, urban stormwater runoff and septic systems.
Radioactive contaminants: can be naturally occurring or the result of oil and gas production and mining activities.
In order to ensure that tap water is safe to drink, the U.S. Environmental Protection Agency, or EPA, prescribes regulations that limit the amount of certain contaminants in water provided by public water systems. The Food and Drug Administration, or FDA, regulations establish limits for contaminants in bottled water that must provide the same protection for public health.
All drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants. The presence of contaminants does not necessarily indicate that water poses a health risk. More information about contaminants and potential health effects is available by calling the EPA Safe Drinking Water Hotline at 800-426-4791.
Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno-compromised persons such as persons with cancer undergoing chemotherapy, persons who have undergone organ transplants, people with HIV/AIDS or other immune system disorders, some elderly people and some infants can be particularly at risk from infections. These people should seek advice about drinking water from their health care providers. EPA/Centers for Disease Control and Prevention guidelines on appropriate means to lessen the risk of infection by Cryptosporidium and other microbial contaminants are available from the Safe Drinking Water Hotline at 800-426-4791.
IV. Important Definitions
Maximum Contaminant Level, or MCL, is the highest level of a contaminant in drinking water. MCLs are set as close to the Maximum Contaminant Level Goals (see below) as feasible using the best available treatment technology.
Maximum Contaminant Level Goal, or MCLG, is the level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety.
Maximum Residual Disinfectant Level, or MRDL, is the highest level of a disinfectant (chlorine, chloramines, chlorine dioxide) allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
Maximum Residual Disinfectant Level Goal, or MRDLG, is the level of a drinking water disinfectant (chlorine, chloramines, chlorine dioxide) below which there is no known or expected risk to health. MRDLG's do not reflect the benefits of the use of disinfectants to control microbial contaminants.
Action Level, or AL, is the concentration of a contaminant that, if exceeded, triggers treatment or other requirements that a water system must follow.
90th Percentile means that out of every 10 homes, nine were at or below this level.
Treatment Technique, or TT, is a required process intended to reduce the level of a contaminant in drinking water.
Variances and Exemptions are state or EPA permission not to meet an MCL or a treatment technique under certain conditions.
Secondary Maximum Contaminant Level, or SMCL, are the standards developed to protect the aesthetic qualities of drinking water, which are not health-based.
V. Water Quality Testing Results
EPA and state regulations require many tests of water quality after treatment. MWRA follows, and even goes beyond, federal and state standards with the frequency and sensitivity of tests. The EPA has identified more than 120 contaminants that must be tested in drinking water. A complete list can be found at www.mwra.com.
During 2018, the MWRA reported finding nine EPA identified contaminants, listed in the tables below. None of the contaminant levels detected exceeded the EPA's MCLs.
Links to the full reports for the towns of Lexington and Bedford are at http://www.mwra.com/annual/waterreport/2018results/2018results.htm.
Locate Bedford’s report under “Partially Supplied Communities.”
Hanscom AFB has one interconnection with Bedford that is used to supply the 66th Force Support Squadron's FamCamp. Bedford has its own groundwater supply and it purchases surface water from Lexington. In 2018, the entire system was provided with 180.5 million gallons of water. Approximately 97 percent of this water was supplied by the MWRA. The Shawsheen Groundwater Treatment Facility supplied the remaining three percent.
MWRA tests reservoir water for pathogens such as fecal coliform, bacteria, viruses and the parasites Cryptosporidium and Giardia that can enter the water from animal or human waste. All test results were well within state and federal testing and treatment standards. If detected. cryptosporidium can cause gastrointestinal illness, with symptoms that include diarrhea, nausea and/or stomach cramps. People with severely weakened immune systems are likely to have more severe and more persistent symptoms compared to healthy individuals. These people should seek advice about drinking water from their health care providers.
Hanscom AFB provides quality drinking water by maintaining the local distribution system, flushing the system and testing regularly. Along with the routine water evaluations performed by the MWRA, the base's BE office monitors the quality of our water by testing it monthly at 11 locations for bacteria, chlorine and pH levels on the base and FamCamp. A qualified staff member collects samples and delivers them to the MWRA for analysis.
Bacteriological Testing: The drinking water at Hanscom AFB is tested twice a month. Eleven samples taken across Hanscom are tested for Total Coliform. Total Coliform is a non-pathogenic bacteria that is naturally present in the environment. A Total Coliform positive from the lab is an alert to check for E.coli, which is a subgroup of fecal coliform. The MCL for Hanscom is two positive samples a month.
In 2018, four samples tested positive for total coliform: two on Nov. 8 in Building 1811 and two on Nov. 27 at FamCamp site 66, as shown in Table 2.
No disease-causing bacteria were detected. In accordance with the Revised Total Coliform Rule, a Level 1 Assessment was completed in December to identify the root cause. Building 1811 is in an area of the base with occasional low flow, but no root cause was determined.
Officials believe that FamCamp was caused by low residual chlorine levels in the Town of Bedford Wiggins Street vault feed. Hanscom met with Bedford officials to ensure notification of low residual chlorine levels, allowing proactive flushing of the FamCamp distribution system in the future.
Lead and Copper: If present, elevated levels of lead can cause serious health problems, especially for pregnant women and young children. Lead in drinking water is primarily from materials and components associated with service lines and home plumbing. MWRA is responsible for providing high-quality drinking water, but cannot control the variety of materials used in plumbing components. When water has been sitting stagnant for several hours, the potential for lead exposure is minimized by flushing the tap for 30 seconds to two minutes before using water for drinking or cooking. If concerned about lead in the water, users may wish to have the water tested. Information on lead in drinking water, testing methods and steps to take to minimize exposure is available from the Safe Drinking Water Hotline or at http://www.epa.gov/safewater/lead.
MWRA water is lead-free when it leaves the reservoirs. The pipes that carry the water to communities are made mostly of iron and steel and do not add lead to water. However, local water pipes and home plumbing fixtures containing lead and copper material may affect water quality at the tap. Corrosion or pipes wearing away may also add lead and copper to tap water.
In 2016, testing was conducted at 20 random locations throughout Hanscom AFB and the FamCamp to determine compliance with established guidelines. The 90th percentile results for both lead and copper were below the EPA established action levels (Table 3). This puts the Hanscom AFB system in compliance with federal regulation requirements. The next lead and copper compliance sampling period is scheduled for September 2019.
The 66th Force Support Squadron requested that water lead samples be collected at the Child Development Center and Youth Center.
Additional water samples collected as part of lead screening at the CDC and Youth Center all tested below the lead action level (AL) of 0.015 mg/L. The EPA requires two potable faucets be checked, while the Department of Defense requires all faucets at the CDC and Youth Center be checked.
In 2018, water samples collected at the School Age Program in Building 1999 detected eight samples that exceeded the action level (AL) of 0.015 mg/L for lead. While none of these sampling locations were used as drinking water sources (the facility relied on bottled water for that), in response to these findings, the School-Age Program was relocated to a temporary facility while Building 1999 underwent replacement of its old plumbing system. Plumbing upgrades continued into 2019.
VI. COMPLIANCE WITH DRINKING WATER REGULATIONS
Does Hanscom Air Force Base drinking water meet current health standards?
Yes, the water at Hanscom AFB meets current health standards. Hanscom AFB Civil Engineering and Bioenvironmental Engineering are committed to providing residents with the best water quality available and confirm that it meets or exceeds regulatory standards through regular monitoring as discussed above. In addition, Hanscom AFB has contingency plans in place to both notify and protect you in the event monitoring results indicate a potential concern.
VII. EDUCATIONAL INFORMATION
Frequently asked questions:
Q. How would I know about a problem with the water supply?
A. Bioenvironmental Engineering and Water Utilities regularly test and inspect the water supply and the distribution system. If a problem was found, all affected people would be notified through leaflets, email and the Hansconian, the base newspaper.
Q. My water tastes and smells funny. Is it safe to drink?
A. According to MWRA, you can safely drink and cook with the water. Algae can cause water to have a "funny" smell and odor. Algae are normal, harmless plants that appear in the reservoirs at certain times of the year. On occasion, customers may also taste or smell the low levels of chlorine compounds added to disinfect the water. Fill a jug with tap water and put it the refrigerator to get rid of the taste and odor.
Q. My water is cloudy sometimes but then clears up. Can I drink it?
A. You can safely drink and cook with the water. Water travels under pressure throughout the system. Occasionally, air can become trapped in the water in tiny bubbles causing water to look cloudy. This is only temporary and the water clears up in a short time.
Q. My water is discolored. Can I drink it?
A. According to MWRA, you can safely drink and cook with the water. Old iron pipes in buildings can cause a red, brown or yellow color in the water. A yellow color is from iron that is absorbed by water that has been sitting in pipes for a long time. Small specks of iron in the water cause a red or brown color. These specks of iron can enter the water if there is a quick change in water speed or direction in your local pipes. Such changes can result from valve repair, flushing the system or the testing and use of fire hydrants.
For more information or concerns about anything contained in this report, call any of the numbers listed below. Hanscom does not hold regularly scheduled board meetings for public participation in decisions that may affect the quality of the water.
Bioenvironmental Engineering: 781-225-6366
Massachusetts Water Resource Authority: 617-242-5323
EPA Safe Drinking Water Hotline: 800-426-4791
Hanscom AFB Public Affairs Office: 781-225-1685
Bedford Department of Public Works: 781-275-7605
Additional information can be obtained by viewing the following websites:
http://www.mwra.state.ma.us
http://www.mass.gov/dep/water/drinking/swapreps.htm
http://www.state.ma.us/dep/brp/dws/