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National Drinking Water Database

Strontium-90 in Delaware

Strontium-90 is a radioactive pollutant from nuclear fallout and possibly weapons and power production.

The Most Polluted Communities in Delaware

3 water utilities reported detecting Strontium-90 in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Strontium-90 level

RankSystem Population Served Positive test results of total reported tests Average Level
1United Water Delaware
Wilmington, DE
105,2702 of 20.22 pCi/L
(0.15 to 0.29 pCi/L)
2Wilmington Water Department
Wilmington, DE
140,0001 of 10.18 pCi/L
(0.18 pCi/L)
3Newark Water Department
Newark, DE
36,1302 of 20.12 pCi/L
(0.02 to 0.22 pCi/L)

Health Based Limits for Strontium-90

There are no health based standards that EWG is using for this chemical

Violation Summary for Strontium-90 in Delaware

There are no violations reported for this contaminant in Delaware