The Power of Information

National Drinking Water Database


Horsham Water & Sewer Auth Utilities - Valley Forge, PA


Serves 25,000 people

1,1,2-Trichloroethane

1,1,2-Trichloroethane is used in production of synthetic fibers, plastic wraps and adhesives; it is released as a pollutant from various chemical manufacturing factories.
 
This Drinking Water System
Test Days Exceeding Health GuidelinesDefinition of what this is
0 days
Test Days Exceeding Legal LimitsNumber of days in which the samples taken in that day exceed the Maximum Contaminant Level (Depending on the contaminant and its MCL, that may or may not trigger an MCL violation. Some MCLs are based on averages spanning several months to a year)
0 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
37 days
Tests ConductedNumber of individual tests done for this contaminant
138 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
1,1,2-Trichloroethane1,1,2-Trichloroethane is used in production of synthetic fibers, plastic wraps and adhesives; it is released as a pollutant from various chemical manufacturing factories.0 ppb
0 ppb
No
0.3 ppb
No
5 ppb
NOTE: Each dot in the above graph represents one month.
* Water utilities are noted as exceeding the legal limit if any test is above the maximum contaminant level (MCL). Most MCLs are based on annual averages so exceeding the MCL for one test does not necessarily indicate that the system is out of compliance.

Health Based and Legal Limits for 1,1,2-Trichloroethane

Health Based Limits for 1,1,2-Trichloroethane

StandardDescriptionLevel
California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.0.3 ppb
EPA Human Health Water Quality CriteriaWater quality criteria set by the US EPA provide guidance for states and tribes authorized to establish water quality standards under the Clean Water Act (CWA) to protect human health. These are non-enforceable standards based upon exposure by both drinking water and the contribution of water contamination to other consumed foods. Source: U.S. Environmental Protection Agency.0.59 ppb
One in one million (10-6) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 1,000,000. Source: U.S. Environmental Protection Agency.0.6 ppb
Maximum Contaminant Limit Goal (MCLG)A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.3 ppb
Lifetime health-based limit, non-cancer riskConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for a lifetime of exposure. The Lifetime health-based limit (or Health Advisory, HA) is based on exposure for a a 70-kg adult consuming 2 liters of water per day. Source: U.S. Environmental Protection Agency.3 ppb
Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.5 ppb
One in ten thousand (10-4) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 10,000. Source: U.S. Environmental Protection Agency.60 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.100 ppb
Children's health-based limit for 10-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic effects for up to ten days of exposure. The Ten-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.400 ppb
Children's health-based limit for 1-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for up to one day of exposure. The One-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.600 ppb

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2009-01-230 ppb330 ppb
2008-10-100 ppb440 ppb
2008-09-260 ppb110 ppb
2008-07-250 ppb330 ppb
2008-07-110 ppb110 ppb
2008-05-230 ppb330 ppb
2008-05-160 ppb330 ppb
2008-04-180 ppb660 ppb
2008-04-110 ppb220 ppb
2008-01-180 ppb440 ppb
2007-10-120 ppb440 ppb
2007-08-030 ppb110 ppb
2007-07-130 ppb440 ppb
2007-04-270 ppb990 ppb
2007-04-050 ppb440 ppb
2007-02-090 ppb440 ppb
2006-12-110 ppb110 ppb
2006-11-170 ppb110 ppb
2006-11-030 ppb330 ppb
2006-08-110 ppb440 ppb
2006-06-230 ppb110 ppb
2006-05-120 ppb330 ppb
2006-04-280 ppb110 ppb
2006-03-170 ppb990 ppb
2006-01-130 ppb440 ppb
2005-12-130 ppb110 ppb
2005-11-100 ppb440 ppb
2005-08-120 ppb990 ppb
2005-07-150 ppb440 ppb
2005-04-150 ppb440 ppb
2005-01-120 ppb440 ppb
2004-10-130 ppb440 ppb
2004-08-110 ppb440 ppb
2004-05-190 ppb110 ppb
2004-05-120 ppb12120 ppb
2004-01-210 ppb110 ppb
2004-01-140 ppb770 ppb