The Power of Information

National Drinking Water Database


United Water Idaho Inc Utilities - Boise, ID


Serves 185,787 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
41 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
60 days
Tests ConductedNumber of individual tests done for this contaminant
251 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.7.75 ppb
68 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
2009-02-110 ppb550 ppb
2009-02-1017.75 ppb4014 to 22 ppb
2008-11-186.25 ppb850 to 18 ppb
2008-08-210 ppb440 ppb
2008-08-209.5 ppb420 to 23 ppb
2008-08-1511.6 ppb520 to 25 ppb
2008-08-145.09 ppb1180 to 28 ppb
2008-06-128 ppb210 to 16 ppb
2008-06-1126 ppb710 to 38 ppb
2008-06-1014.4 ppb520 to 30 ppb
2008-05-230 ppb220 ppb
2008-05-200 ppb220 ppb
2008-05-1915.5 ppb410 to 33 ppb
2008-04-110 ppb220 ppb
2008-04-0813.13 ppb810 to 17 ppb
2008-04-074.17 ppb640 to 14 ppb
2008-02-213.67 ppb320 to 11 ppb
2008-02-195.2 ppb530 to 16 ppb
2008-02-135 ppb210 to 10 ppb
2008-02-129.25 ppb820 to 19 ppb
2008-02-1111.8 ppb5010 to 15 ppb
2007-12-1319 ppb1019 ppb
2007-12-124 ppb430 to 16 ppb
2007-12-116 ppb950 to 15 ppb
2007-11-200 ppb220 ppb
2007-11-197.83 ppb630 to 19 ppb
2007-08-2811 ppb420 to 24 ppb
2007-08-270 ppb440 ppb
2007-05-082.25 ppb870 to 18 ppb
2007-02-202.43 ppb760 to 17 ppb
2007-02-200.02 MFL*1016 ppb
2006-12-052.5 ppb650 to 15 ppb
2006-11-307 ppb210 to 14 ppb
2006-09-197.83 ppb630 to 22 ppb
2006-09-130 ppb220 ppb
2006-06-2118.33 ppb310 to 32 ppb
2006-06-204.6 ppb540 to 23 ppb
2006-03-1725.5 ppb6014 to 39 ppb
2006-03-149.8 ppb530 to 25 ppb
2005-11-040 ppb220 ppb
2005-11-039.33 ppb310 to 14 ppb
2005-11-025 ppb210 to 10 ppb
2005-11-016 ppb420 to 13 ppb
2005-09-220 ppb220 ppb
2005-09-1911 ppb310 to 18 ppb
2005-09-160 ppb770 ppb
2005-09-150 ppb440 ppb
2005-06-160 ppb440 ppb
2005-06-1510.15 ppb720 to 21 ppb
2005-04-0568 ppb1068 ppb
2005-03-0311.5 ppb410 to 20 ppb
2005-03-020 ppb440 ppb
2004-12-090 ppb110 ppb
2004-12-023.43 ppb430 to 13.7 ppb
2004-09-230 ppb220 ppb
2004-09-225.03 ppb430 to 20.1 ppb
2004-09-210 ppb220 ppb
2004-06-0125.15 ppb2022 to 28.3 ppb
2004-05-270 ppb440 ppb
2004-05-260 ppb220 ppb