Strontium

Norwalk Water Department

Strontium is a metal that accumulates in the bones. Radioactive strontium-90 can cause bone cancer and leukemia, and any form of strontium at high doses can harm bone health.

MORE ABOUT THIS CONTAMINANT

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2013	0.645 ppb	36	36	0.410 ppb - 0.940 ppb
2014	N/A	0	0	N/A
2015	N/A	0	0	N/A
2016	N/A	0	0	N/A
2017	N/A	0	0	N/A
2018	N/A	0	0	N/A
2019	N/A	0	0	N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 1,500 ppb

The EWG Health Guideline of 1,500 ppb for strontium was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against harm to bones.

ppb = parts per billion

All test results

Date	Lab ID	Result
2013-01-31	2774511	0.510 ppb
2013-01-31	2774513	0.450 ppb
2013-01-31	2774507	0.780 ppb
2013-01-31	2774505	0.770 ppb
2013-01-31	2774517	0.410 ppb
2013-01-31	2774527	0.750 ppb
2013-01-31	2774509	0.700 ppb
2013-01-31	2774523	0.700 ppb
2013-01-31	2774525	0.760 ppb
2013-01-31	2774519	0.440 ppb
2013-01-31	2774521	0.570 ppb
2013-01-31	2774515	0.670 ppb
2013-04-30	2818650	0.760 ppb
2013-04-30	2818630	0.480 ppb
2013-04-30	2818626	0.890 ppb
2013-04-30	2818634	0.440 ppb
2013-04-30	2818648	0.620 ppb
2013-04-30	2818632	0.770 ppb
2013-07-29	2869360	0.830 ppb
2013-07-29	2869376	0.760 ppb
2013-07-29	2869388	0.450 ppb
2013-07-29	2869384	0.770 ppb
2013-07-29	2869380	0.780 ppb
2013-07-29	2869372	0.610 ppb
2013-07-29	2869368	0.710 ppb
2013-07-29	2869323	0.940 ppb
2013-07-29	2869351	0.470 ppb
2013-07-29	2869295	0.750 ppb
2013-07-29	2869306	0.780 ppb
2013-07-29	2869342	0.440 ppb
2013-10-29	2922262	0.860 ppb
2013-10-29	2922271	0.570 ppb
2013-10-29	2922282	0.430 ppb
2013-10-29	2922303	0.660 ppb
2013-10-29	2922290	0.410 ppb
2013-10-29	2922297	0.540 ppb