Know Your Environment. Protect Your Health.

Antimony

CTWC - Unionville System

NOTE: CTWC - Unionville System purchases water from Metropolitan District Commission which is required to test for antimony. Sample information shown below was taken by Metropolitan District Commission.

Antimony is a naturally occurring metal that enters tap water from plumbing fittings and also from industrial uses, such as production of metal alloys, batteries and plastics. Antimony causes organ damage and shortens lifespans in studies of laboratory animals.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND20ND
2020ND20ND
2021ND10ND
2022ND10ND
2023ND10ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 1 ppb

The EWG Health Guideline of 1 ppb for antimony 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 change to the stomach and intestines.

EPA Maximum Contaminant
Level (MCL): 6 ppb

The legal limit for antimony, established in 1992, was based on a toxicity study in laboratory animals published in 1970. This limit does not include any additional consideration of children’s health.

ppb = parts per billion

All test results

NOTE: CTWC - Unionville System purchases water from Metropolitan District Commission which is required to test for antimony. Sample information shown below was taken by Metropolitan District Commission.

Date Lab ID Result
2018-07-18AE01630GEND
2018-07-18AE01632GEND
2018-07-18AE01631GEND
2019-12-03CE70740ND
2019-12-03CE70739ND
2019-12-03CE70741ND
2020-12-08IOC1 200600637ND
2020-12-08IOC1 200600611ND
2020-12-09IOC1 200600603ND
2021-11-23E300107450 300107454ND
2021-11-23E300107451 300107460ND
2021-11-29E300109635 300109640ND
2022-12-15E300287053 300287057ND
2022-12-15E300287072 300287076ND
2022-12-15E300287100 300287104ND
2023-12-05E300456248 300456251ND
2023-12-06E300456222 300456225ND
2023-12-06E300456228 300456231ND