DCPA mono- and di-acid degradates

Sands Point

DCPA degradates are residues of the herbicide dacthal, or DCPA, which is used for urban, household and agricultural applications. Dacthal is a possible human carcinogen whose use was limited by the EPA in 2005 due to concerns about water contamination.

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Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	N/A	0	0	N/A
2015	4.50 ppb	5	5	1.30 ppb - 8.10 ppb
2016	9.11 ppb	23	19	ND - 83.5 ppb
2017	N/A	0	0	N/A
2018	N/A	0	0	N/A
2019	ND	5	0	ND

ppb = parts per billion

All test results

Date	Lab ID	Result
2015-09-22	1509H04-003	4.30 ppb
2015-09-22	1509H04-002	1.30 ppb
2015-09-22	1509H04-001	5.80 ppb
2015-09-22	1509H04-005	8.10 ppb
2015-12-14	1512B49-001A-SOC	3.00 ppb
2016-03-22	1603H56-001	3.20 ppb
2016-03-22	1603H56-003	ND
2016-03-22	1603H56-002	ND
2016-03-22	1603H56-004	3.30 ppb
2016-03-22	1603H56-005	4.30 ppb
2016-05-23	1605L07-005	4.80 ppb
2016-05-23	1605L07-002	1.000 ppb
2016-05-23	1605L07-001	3.40 ppb
2016-05-23	1605L07-004	3.80 ppb
2016-05-23	1605L07-003	1.000 ppb
2016-08-24	1608N54-001	83.5 ppb
2016-08-29	1608Q83-001	11.0 ppb
2016-09-09	1609705-001	24.0 ppb
2016-09-15	1609D59-001	23.0 ppb
2016-09-26	1609M44-003	2.40 ppb
2016-09-26	1609M44-005	1.30 ppb
2016-09-26	1609M44-001	4.20 ppb
2016-09-26	1609M44-004	3.50 ppb
2016-09-26	1609M44-003A	ND
2016-11-16	704941001	22.0 ppb
2016-12-01	705824005	ND
2016-12-01	705824004	5.10 ppb
2016-12-01	705824001A	4.70 ppb
2019-11-12	70111549002	ND
2019-11-12	70111549006	ND
2019-11-12	70111549004	ND
2019-11-12	70111549005	ND
2019-11-12	70111549003	ND