Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Guilford Water Authority

2(2,4,5-trichlorophenoxy) propionic acid (2,4,5-TP or Silvex) is a cancer-causing herbicide banned in the U.S. in 1985 because of its toxicity. It is still detected as a groundwater contaminant in areas where it was sprayed or stored.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND10ND
2020ND60ND
2021N/A00N/A
2022N/A00N/A
2023ND100ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 3 ppb

The EWG Health Guideline of 3 ppb for 2,4,5-TP was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to internal organs.

EPA Maximum Contaminant
Level (MCL): 50 ppb

ppb = parts per billion

All test results

Date Lab ID Result
2018-05-298055384-01ND
2018-09-048091925-01ND
2018-12-118122846-01ND
2019-03-059032320-01ND
2020-06-0922559596.00ND
2020-06-0922559566.00ND
2020-06-0922559536.00ND
2020-09-0923136538.00ND
2020-09-0923136556.00ND
2020-09-0923136586.00ND
2023-05-1729053234.00ND
2023-05-1729053250.00ND
2023-05-1729053266.00ND
2023-05-2429053424.00ND
2023-05-2429053391.00ND
2023-07-1829651145.00ND
2023-07-1829651237.00ND
2023-07-1829651157.00ND
2023-08-0129651270.00ND
2023-08-0129651217.00ND