The Power of Information

National Drinking Water Database


Chester Water Authority Utilities - Wayne, PA


Serves 124,649 people

Total haloacetic acids (HAAs)

Total haloacetic acids refers to the sum of the concentrations of five related disinfection byproducts in a water sample: dichloroacetic acid, trichloroacetic acid, monochloroacetic acid, monobromoacetic acid and dibromoacetic acid.
 
This Drinking Water System
Test Days Exceeding Health GuidelinesDefinition of what this is
37 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)
3 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
152 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
Total haloacetic acids (HAAs)Total haloacetic acids refers to the sum of the concentrations of five related disinfection byproducts in a water sample: dichloroacetic acid, trichloroacetic acid, monochloroacetic acid, monobromoacetic acid and dibromoacetic acid.39.22 ppb
75.5 ppb
Yes
0.7 ppb
Yes
60 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 Total haloacetic acids (HAAs)

Health Based Limits for Total haloacetic acids (HAAs)

StandardDescriptionLevel
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.0.7 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.60 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.70 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.70 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.450 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.5200 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.5200 ppb

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2009-03-1032.28 ppb4028 to 35 ppb
2009-02-1022.6 ppb4018.9 to 26.9 ppb
2009-01-1335.8 ppb4033.6 to 38 ppb
2008-12-0934.75 ppb4032 to 36 ppb
2008-11-1256.73 ppb4049 to 67.1 ppb
2008-10-1441.15 ppb4033.2 to 45.4 ppb
2008-09-1651.55 ppb4042 to 57.9 ppb
2008-08-1263.88 ppb4058.4 to 75.4 ppb
2008-07-1542.83 ppb4041.4 to 44.9 ppb
2008-06-1035.8 ppb4034.5 to 36.8 ppb
2008-05-2027.98 ppb4026.1 to 30.3 ppb
2008-04-1522.03 ppb4021.1 to 23 ppb
2008-03-1127.25 ppb4027 to 28 ppb
2008-02-1235.5 ppb4033 to 37 ppb
2008-01-1529.75 ppb4027 to 32 ppb
2007-12-1058.63 ppb4056.2 to 61.8 ppb
2007-11-1360.48 ppb4056 to 65.2 ppb
2007-10-1020.63 ppb4017.6 to 23 ppb
2007-09-1147 ppb4042 to 50 ppb
2007-08-2144.5 ppb4040 to 48 ppb
2007-07-1741.35 ppb4038.4 to 43 ppb
2007-06-1952.43 ppb4047 to 56.7 ppb
2007-05-1740 ppb4039 to 41 ppb
2007-04-1726 ppb4024 to 27 ppb
2007-01-1742.53 ppb4030.7 to 52.9 ppb
2006-10-1740.1 ppb4025.1 to 50.8 ppb
2006-07-1843.48 ppb4028.6 to 55.5 ppb
2006-04-1121.55 ppb4015.4 to 25.1 ppb
2006-01-1052.1 ppb4032.4 to 72.3 ppb
2005-10-0628.45 ppb4022.1 to 35 ppb
2005-07-2575.5 ppb4064 to 82.7 ppb
2005-04-2140.63 ppb4035.9 to 43.2 ppb
2005-01-2041.98 ppb4027.9 to 55.3 ppb
2004-10-2138.98 ppb4022.5 to 50.8 ppb
2004-07-2234.25 ppb4025 to 39 ppb
2004-04-1424.75 ppb8018 to 27 ppb
2004-01-2116.03 ppb4010.7 to 18.7 ppb