The Power of Information

National Drinking Water Database


Presque Isle Water District Utilities - Limestone, ME


Serves 5,825 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
24 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)
1 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
26 days
Tests ConductedNumber of individual tests done for this contaminant
95 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.32.61 ppb
172.33 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
2009-05-1353 ppb2048 to 58 ppb
2009-05-1242 ppb6028 to 63 ppb
2009-03-1015.33 ppb3013 to 17 ppb
2008-11-2535.25 ppb410 to 64 ppb
2008-09-030 ppb220 ppb
2008-09-0227.67 ppb6018 to 33 ppb
2008-06-2643 ppb1043 ppb
2008-06-1719 ppb3014 to 22 ppb
2008-02-1912.73 ppb405.3 to 20 ppb
2007-11-1322.75 ppb410 to 35 ppb
2007-08-1519.75 ppb410 to 29 ppb
2007-05-2128.5 ppb4019 to 37 ppb
2007-02-2712.75 ppb410 to 20 ppb
2006-11-1345.75 ppb4033 to 53 ppb
2006-09-1224 ppb4020 to 26 ppb
2006-05-0827 ppb4011 to 65 ppb
2006-02-2720.5 ppb410 to 31 ppb
2005-10-2547.25 ppb410 to 70 ppb
2005-07-1320.25 ppb4016 to 31 ppb
2005-06-0118.8 ppb410 to 55 ppb
2005-03-1522 ppb410 to 30 ppb
2004-11-0246.75 ppb410 to 64 ppb
2004-08-110 ppb110 ppb
2004-08-10172.33 ppb30171 to 173 ppb
2004-05-2458.75 ppb410 to 91 ppb
2004-02-1012.75 ppb420 to 26 ppb