Know Your Environment. Protect Your Health.

Silver

North Castle Water District #1

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

Silver occurs naturally in surface and groundwater and can be added to water as a biocide that inhibits growth of bacteria and algae. Increasingly, the use of antimicrobial nano-sized silver particles in consumer products contributes to silver in water sources used for drinking water.

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND40ND
2021ND40ND
2022ND40ND
2023ND40ND

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 silver. Sample information shown below was taken by White Plains City.

Date Lab ID Result
2018-06-2018-6370 INSND
2018-06-2018-6369 INSND
2019-06-1819-6351 INSND
2019-06-1819-6356 INSND
2020-03-17AW05444-INSND
2020-03-17AW06446-INSND
2020-03-17AW05448-INSND
2020-06-1720-6146-INSND
2020-06-1720-6145-INSND
2020-08-06AW15047-INSND
2021-02-23AX03551-INSND
2021-02-23AX03555-INSND
2021-02-23AX03553-INSND
2021-06-1621-7096-INSND
2021-06-1621-7097-INSND
2021-07-08AX13365-INSND
2022-02-15AY02769-INSND
2022-02-15AY02771-INSND
2022-02-15AY02773-INSND
2022-06-1522-6654-INSND
2022-06-1522-6653-INSND
2022-09-12AY16285-INSND
2023-02-14AZ02824-INSND
2023-02-14AZ02826-INSND
2023-02-14AZ02821-INSND
2023-07-10AZ12311-INSND
2023-08-1523-9193-INS-WPND
2023-08-1523-9192-INS-WPND