Haloacetic acids (HAA5)

Old North Utilities Services/Ft. Bragg

Haloacetic acids are formed when disinfectants such as chlorine are added to tap water. The group of five haloacetic acids regulated by federal standards includes monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, monobromoacetic acid and dibromoacetic acid. Read More.

Haloacetic acids are harmful during pregnancy and may increase the risk of cancer. Haloacetic acids are� genotoxic, which means that they induce mutations and DNA damage. Multiple studies by the National Toxicology Program have demonstrated the cancer-causing properties of individual haloacetic acids in laboratory animals. The Department of Health and Human Services is currently considering listing di- or tri-haloacetic acids for possible inclusion in its comprehensive Report on Carcinogens.

Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

193

Samples

Samples exceeding legal limit (MCL)

186

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2013	N/A	0	0	N/A
2014	22.7 ppb	32	30	ND - 43.2 ppb
2015	21.1 ppb	33	32	ND - 42.9 ppb
2016	14.0 ppb	32	31	ND - 21.6 ppb
2017	13.9 ppb	32	31	ND - 22.3 ppb
2018	18.1 ppb	32	31	ND - 33.8 ppb
2019	13.1 ppb	32	31	ND - 30.0 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for the group of five haloacetic acids, or HAA5, was defined in a peer-reviewed scientific study by EWG and represents a one-in-a-million lifetime cancer risk level. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL) 60 ppb

The legal limit for the group of five haloacetic acids (HAA5), established in 1998, was based on the need for residual disinfectant levels in water served to customers and the cost of treatment. This limit does not fully protect against the risk of cancer and harm to the developing fetus due to exposure to haloacetic acids.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-02-05	2969283	12.7 ppb
2014-02-05	2969286	11.5 ppb
2014-02-05	2969289	12.0 ppb
2014-02-05	2969292	11.5 ppb
2014-02-05	2969295	8.00 ppb
2014-02-05	2969298	11.5 ppb
2014-02-05	2969301	15.1 ppb
2014-02-05	2969304	13.3 ppb
2014-05-05	3023365	34.0 ppb
2014-05-05	3021741	19.3 ppb
2014-05-05	3021744	19.2 ppb
2014-05-05	3021747	24.2 ppb
2014-05-05	3021753	27.1 ppb
2014-05-05	3021756	21.3 ppb
2014-05-05	3021541-42	18.0 ppb
2014-05-05	3021537-38	24.0 ppb
2014-08-04	3078376	28.4 ppb
2014-08-04	3078382	28.9 ppb
2014-08-04	3078385	42.8 ppb
2014-08-04	3078388	38.5 ppb
2014-08-04	3078391	34.0 ppb
2014-08-04	3078370	43.2 ppb
2014-08-04	3078373	ND
2014-08-04	3078379	31.2 ppb
2014-11-03	1443972-01	35.3 ppb
2014-11-03	1443973-01	33.1 ppb
2014-11-03	1443976-01	13.7 ppb
2014-11-03	1443977-01	26.9 ppb
2014-11-03	1443978-01	33.1 ppb
2014-11-03	1443979-01	ND
2014-11-03	1443980-01	19.0 ppb
2014-11-03	1443982-01	34.1 ppb
2015-02-09		28.0 ppb
2015-02-09		24.1 ppb
2015-02-09		28.0 ppb
2015-02-09		31.0 ppb
2015-02-09		10.3 ppb
2015-02-09		25.9 ppb
2015-02-09		28.5 ppb
2015-02-09		25.4 ppb
2015-02-09		19.0 ppb
2015-05-04		21.3 ppb
2015-05-04		21.4 ppb
2015-05-04		19.0 ppb
2015-05-04		21.7 ppb
2015-05-04		21.3 ppb
2015-05-04		20.3 ppb
2015-05-04		14.6 ppb
2015-05-04		21.6 ppb
2015-08-03		7.70 ppb
2015-08-03		40.0 ppb
2015-08-03		1.70 ppb
2015-08-03		19.2 ppb
2015-08-03		42.9 ppb
2015-08-03		23.5 ppb
2015-08-03		30.7 ppb
2015-08-03		36.7 ppb
2015-11-02		ND
2015-11-02		21.1 ppb
2015-11-02		5.60 ppb
2015-11-02		24.0 ppb
2015-11-02		4.70 ppb
2015-11-02		14.0 ppb
2015-11-02		20.0 ppb
2015-11-02		22.0 ppb
2016-02-01	16020327-001	16.9 ppb
2016-02-01	16020328-001	15.4 ppb
2016-02-01	16020322-001	16.6 ppb
2016-02-01	16020323-001	4.00 ppb
2016-02-01	16020324-001	16.0 ppb
2016-02-01	16020325-001	20.0 ppb
2016-02-01	16020326-001	21.2 ppb
2016-02-02	16020320-001	14.0 ppb
2016-05-02	3440471	17.7 ppb
2016-05-02	3440472	13.2 ppb
2016-05-02	3440473	21.6 ppb
2016-05-02	3440474	19.9 ppb
2016-05-02	3440475	12.6 ppb
2016-05-02	3440476	14.1 ppb
2016-05-02	3440477	2.60 ppb
2016-05-02	3440478	15.1 ppb
2016-08-01	3514671	20.4 ppb
2016-08-01	3514672	18.3 ppb
2016-08-01	3514674	13.8 ppb
2016-08-02	3514673	19.2 ppb
2016-08-02	3514675	ND
2016-08-02	3514676	18.6 ppb
2016-08-02	3514677	18.1 ppb
2016-08-02	3514678	14.1 ppb
2016-11-08	3583367	9.40 ppb
2016-11-08	3583368	11.4 ppb
2016-11-08	3583369	14.0 ppb
2016-11-08	3583370	8.70 ppb
2016-11-08	3583371	14.0 ppb
2016-11-08	3583372	11.4 ppb
2016-11-08	3583373	12.6 ppb
2016-11-08	3583374	3.80 ppb
2017-02-08	3635985	8.80 ppb
2017-02-08	3635986	8.20 ppb
2017-02-08	3635987	10.2 ppb
2017-02-08	3635988	8.90 ppb
2017-02-09	3635989	9.20 ppb
2017-02-09	3635990	10.00 ppb
2017-02-09	3635991	8.70 ppb
2017-02-09	3635992	6.50 ppb
2017-05-01	3688556	19.0 ppb
2017-05-01	3688557	20.3 ppb
2017-05-01	3688558	20.6 ppb
2017-05-01	3688568	16.2 ppb
2017-05-01	3688570	18.1 ppb
2017-05-02	3688562	22.3 ppb
2017-05-02	3688563	18.3 ppb
2017-05-02	3688564	9.10 ppb
2017-08-28	3767963	15.6 ppb
2017-08-28	3767949	20.6 ppb
2017-08-28	3767951	16.0 ppb
2017-08-28	3767953	17.2 ppb
2017-08-28	3767955	16.9 ppb
2017-08-28	3767957	ND
2017-08-28	3767959	19.9 ppb
2017-08-28	3767961	16.3 ppb
2017-11-08	3817630	14.7 ppb
2017-11-08	3817632	10.00 ppb
2017-11-08	3817634	13.5 ppb
2017-11-08	3817636	14.4 ppb
2017-11-08	3817637	13.7 ppb
2017-11-08	3817639	14.5 ppb
2017-11-08	3817641	16.5 ppb
2017-11-16	3823226	9.40 ppb
2018-02-08	3868634	17.7 ppb
2018-02-08	3868636	14.3 ppb
2018-02-08	3868638	14.1 ppb
2018-02-08	3868640	15.1 ppb
2018-02-08	3868642	13.1 ppb
2018-02-08	3868644	15.5 ppb
2018-02-08	3868646	12.6 ppb
2018-02-08	3868648	14.0 ppb
2018-05-07	3933437	18.0 ppb
2018-05-07	3933439	23.7 ppb
2018-05-07	3933441	2.50 ppb
2018-05-08	3933443	18.8 ppb
2018-05-08	3933445	19.1 ppb
2018-05-08	3933447	22.1 ppb
2018-05-08	3933449	16.6 ppb
2018-05-15	3940684	18.9 ppb
2018-08-09	4017795	30.6 ppb
2018-08-20	4034188	33.8 ppb
2018-08-21	4034182	23.2 ppb
2018-08-21	4034183	30.9 ppb
2018-08-21	4034184	30.3 ppb
2018-08-21	4034186	29.3 ppb
2018-08-21	4034187	28.1 ppb
2018-08-23	4034185	ND
2018-11-07	4116582	13.6 ppb
2018-11-07	4116586	14.1 ppb
2018-11-07	4116588	14.0 ppb
2018-11-07	4116590	14.1 ppb
2018-11-08	4116584	14.8 ppb
2018-11-08	4116592	11.9 ppb
2018-11-08	4116594	17.9 ppb
2018-11-08	4116596	15.6 ppb
2019-02-06	4192180-1	9.80 ppb
2019-02-06	4192182-1	ND
2019-02-06	4192186-1	30.0 ppb
2019-02-06	4192188-1	9.90 ppb
2019-02-06	4192190-1	13.0 ppb
2019-02-06	4192192-1	11.7 ppb
2019-02-06	4192194-1	14.0 ppb
2019-02-07	4192196-1	8.90 ppb
2019-05-15	CC07754-01	14.0 ppb
2019-05-15	CC07754-03	15.0 ppb
2019-05-15	CC07754-04	15.0 ppb
2019-05-15	CC07754-05	16.0 ppb
2019-05-15	CC07754-06	12.0 ppb
2019-05-15	CC07754-07	16.0 ppb
2019-05-15	CC07754-08	12.0 ppb
2019-05-15	CC07754-09	17.0 ppb
2019-08-21	CC14143-01	14.0 ppb
2019-08-21	CC14143-02	17.0 ppb
2019-08-21	CC14143-04	15.0 ppb
2019-08-21	CC14143-05	14.0 ppb
2019-08-21	CC14143-06	19.0 ppb
2019-08-21	CC14143-07	16.0 ppb
2019-08-21	CC14143-08	19.0 ppb
2019-08-22	CC14145-01	12.0 ppb
2019-11-19	CC19711-01	9.00 ppb
2019-11-21	CC19713-01	9.00 ppb
2019-11-25	CC19811-01	10.3 ppb
2019-11-25	CC19811-02	10.8 ppb
2019-11-25	CC19811-03	8.10 ppb
2019-11-25	CC19811-04	8.70 ppb
2019-11-25	CC19811-05	10.2 ppb
2019-11-25	CC19811-06	11.5 ppb