Know Your Environment. Protect Your Health.

MTBE

North Castle Water District #1

NOTE: North Castle Water District #1 purchases water from White Plains City which is required to test for mtbe. Sample information shown below was taken by White Plains City.

MTBE was used as gasoline oxygenation additive to boost the octane number. In 2005, MTBE was replaced by ethanol as a gasoline additive. MTBE causes cancers in rats.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND30ND
2021ND30ND
2022ND50ND
2023ND30ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 13 ppb

The EWG Health Guideline of 13 ppb for MTBE 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 cancer.

ppb = parts per billion

All test results

NOTE: North Castle Water District #1 purchases water from White Plains City which is required to test for mtbe. Sample information shown below was taken by White Plains City.

Date Lab ID Result
2018-09-24AU20758 POCSND
2019-11-12AV23849 POCSND
2020-03-17AW05444-POCSND
2020-03-17AW05446-POCSND
2020-03-17AW05448-POCSND
2020-08-06AW15047-POCSND
2020-11-09AW21630-POCSND
2021-02-23AX03555-POCSND
2021-02-23AX03551-POCSND
2021-02-23AX03553-POCSND
2021-07-08AX13365-POCSND
2021-09-20AX19183-WP-POCSND
2022-02-15AY02773-POCSND
2022-02-15AY02769-POCSND
2022-02-15AY02771-POCSND
2022-09-12AY16285-POCSND
2022-10-24AY19121-WP-POCSND
2023-02-14AZ02824-POCSND
2023-02-14AZ02821-POCSND
2023-02-14AZ02826-POCSND
2023-07-10AZ12311-POCSND
2023-10-19AZ19383-POCS-WPND