|
||||||||
| Home | Products | Filters & Parts | F.A.Q.s | Promotions | Contact Us | My Account | View Cart |
 |
 |
 |
|
|||||||||||||
|
|||||||||||||
Drinking Water Contaminants- 1,1,1-TRICHLOROETHANE |
Did
you know?
| This is a factsheet about a chemical that may be found in some public or private drinking water supplies. It may cause health problems if found in amounts greater than the health standard set by the United States Environmental Protection Agency (EPA). What is 1,1,1-TCA and how is it used? 1,1,1-Trichloroethane (1,1,1-TCA) is an organic liquid with a chloroform-like odor. It is largely used as a solvent removing grease from machined metal products, in textile processing and dyeing and in aerosols. The list of trade names given below may help you find out whether you are using this chemical at home or work. Trade Names and Synonyms: Chloroethene Why is 1,1,1-TCA being Regulated? In 1974, Congress passed the Safe Drinking Water Act. This law requires EPA to determine safe levels of chemicals in drinking water which do or may cause health problems. These non-enforceable levels, based solely on possible health risks and exposure, are called Maximum Contaminant Level Goals. The MCLG
for 1,1,1-TCA has been set at 0.2 parts per million (ppm) because EPA believes
this level of protection would not cause any of the potential health problems
described below.
Based on this MCLG, EPA has set an enforceable standard
called a Maximum Contaminant Level (MCL). MCLs are set as close to the MCLGs as
possible, considering the ability of public water systems to detect and remove
contaminants using suitable treatment technologies.
The MCL has been set
at 0.2 ppm because EPA believes, given present technology and resources, this
is the lowest level to which water systems can reasonably be required to remove
this contaminant should it occur in drinking water.
These drinking water standards and the regulations for ensuring these standards are met, are called National Primary Drinking Water Regulations. All public water supplies must abide by these regulations. What are the Health Effects?
Short-term:
EPA has found 1,1,1-TCA to potentially cause the following health effects when
people are exposed to it at levels above the MCL for relatively short periods
of time: damage to the liver, nervous system and circulatory system.
Long-term: 1,1,1-TCA has the potential to cause the following effects from a lifetime exposure at levels above the MCL: liver, nervous system and circulatory system damage. How much 1,1,1-TCA is produced and released to the environment?
Demand for 1,1,1-trichloroethane was 705 million lbs. in 1989. 1,1,1-TCA
is likely to enter the environment by evaporation or in wastewater from its production
or use in metal cleaning. It can also enter the environment in leachates and volatile
emissions from landfills.
From 1987 to 1993, according to EPA's Toxic Chemical
Release Inventory, releases to water and land totalled over 1 million lbs. These
releases were primarily from metal fabrication industries. The largest releases
occurred in California and Georgia. The largest direct releases to water occurred
in Utah and Indiana.
What happens to 1,1,1-TCA when it is released to
the environment?
1,1,1-TCA will evaporate rapidly from water and soil. It does not bind to soils nor is it broken down by microbial action, so it may leach to ground water. It has little tendency to accumulate in aquatic life. How will 1,1,1-TCA be Detected in and Removed from My Drinking Water?
The regulation for 1,1,1-TCA became effective in 1989. Between 1993 and
1995, EPA required your water supplier to collect water samples every 3 months
for one year and analyze them to find out if 1,1,1-TCA is present above 0.5 ppb.
If it is present above this level, the system must continue to monitor this contaminant.
If contaminant levels are found to be consistently above the MCL, your
water supplier must take steps to reduce the amount of 1,1,1-TCA so that it is
consistently below that level. The following treatment methods have been approved
by EPA for removing 1,1,1-TCA: Granular activated charcoal in combination with
Packed Tower Aeration.
How will I know if 1,1,1-TCA is in my drinking
water?
If the levels of 1,1,1-TCA exceed the MCL, 0.2 ppm, the system
must notify the public via newspapers, radio, TV and other means. Additional actions,
such as providing alternative drinking water supplies, may be required to prevent
serious risks to public health.
Drinking Water Standards: Mclg:
0.2 ppm
Mcl: 0.2 ppm 1,1,1-TCA Releases to Water and Land, 1987 to
1993 (in pounds):
* State totals only include facilities with releases greater than 10,000 lbs. As
part of the Drinking Water and Health pages, this fact sheet is part of a larger
U.S. EPA publication: EPA National Primary Drinking Water Regulations | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
We are proud to be the authoritative website for information on water quality solutions, water purification and treatment. We provide heavy duty, professional water filtering products to remove contaminants caused by industrial and agricultural water pollution and contamination to provide safe and pure drinking water. Many of our top quality home reverse osmosis drinking water systems, whole house water filters, salt-free water softeners, and electronic water softeners/conditioners are currently on sale.
 =
Products of Superior Performance and Dependability |
 |
Inorganic Contaminants