Title: Arsenic, a naturally occurring chemical element, is currently used primarily in the production of pe
1Arsenic Facts
- Arsenic, a naturally occurring chemical element,
is currently used primarily in the production of
pesticides and wood preservatives. In some
areas, levels of arsenic are increasing in ground
water supplies because of seepage from hazardous
waste sites. In the past, arsenic compounds were
used for the treatment of certain diseases. This
practice has been discontinued because of an
awareness of arsenics negative effects and
because of the development of safer drugs. - Throughout the world, arsenic in ground water
often comes from natural sources such as bedrock.
The highest natural concentrations of arsenic in
the United States are found in the Southwest, the
Northwest, Alaska, and other areas near
geothermal activity. Arsenical pesticide runoff
also produces elevated arsenic levels in
groundwater. - Additional Facts
- Odorless, tasteless
- Naturally occurs in rocks, soil, water, air,
plants and animals - The average daily arsenic intake in adults is
0.5-1.0mg. - In 2001, the EPA revised the regulation for
arsenic in drinking water to lower the maximum
allowable level from 50 parts per billion (ppb)
to 10 ppb. The new standard became effective on
January 23, 2006. The EPA estimates that more
than 90 of the systems affected by the revised
rule are small, serving population of 3,330
people or less. - The EPA standards for arsenic in water is 10 ppb.
Ten parts per billion (ppb) of arsenic in water
means that there are 10 molecules of arsenic for
every 999,999,990 molecules of water. That is
roughly equivalent to a few drops of ink in an
Olympic-sized swimming pool. - The adverse properties of arsenic compounds, or
arsenicals, have been known for more than 2000
years. - Ingested arsenic is quickly absorbed through the
stomach and intestines. It then enters the blood
stream - Two types of arsenic poisoning acute and chronic
- Acute poisoning occurs when a person ingests
large quantities of arsenic at one time.
Symptoms include the irritation of the digestive
tract, leading to pain, nausea, vomiting,
diarrhea, or causing a pins and needles
sensation in the feet and hands. Can lead to
shock, coma, and/or death - Chronic poisoning occurs over a longer period of
time. Symptoms include non-cancerous skin
lesions, tingling/numbness of the soles and palms
that develops into a painful condition called
neuritis (swelling that causes impairment or loss
of reflexes) - Chronic poisoning is believed to occur when a
person has been exposed and accumulated gt150 ppb
of arsenic. Twenty or thirty years after
exposure to 500 ppb of arsenic, internal cancers
(lung, kidney, liver and bladder) appear among
10 of all exposed. - Treatment is available and complete or partial
recovery is possible within a couple of months.
Arsenic level below 10 parts per billion
(ppb)This water is safe to drink and use for
food preparation. Arsenic level between 10 parts
per billion (ppb) and 500 parts per billion
(ppb)Do not drink your water or use it to
prepare foods that require a lot of water (e.g.
infant formula, soups, Jell-O, rice, coffee, tea)
if the arsenic level is above 10 ppb. Washing
foods and dishes in the water is safe, and is not
a significant source of exposure. Continued use
of water above 10 ppb puts an individual at risk
for developing chronic arsenic poisoning. Arsenic
level above 500 parts per billion (ppb) Stop
using your water for any use. Do not use water
even for showering, bathing, or flushing toilets.
Exposure to gt500 ppb puts and individual at risk
for developing acute arsenic poisoning.