EWG's Tap Water Database — 2019 UPDATE



Hialeah Gardens

Nitrite, closely related to the fertilizer chemical nitrate, comes from urban runoff and from fertilizer applied to agricultural lands to pollute drinking water. Nitrite is significantly more toxic than nitrate. Excessive nitrite in water can cause oxygen deprivation in infants and increase the risk of cancer.





Samples exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
20130.00367 ppm32ND - 0.00700 ppm
20140.0114 ppm74ND - 0.0360 ppm
20150.00867 ppm32ND - 0.0140 ppm
20160.0140 ppm31ND - 0.0420 ppm
20170.00529 ppm72ND - 0.0270 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 1 ppm

The legal limit for nitrite, established in 1991, was based on the rate of conversion of ingested nitrate into nitrite in adults. This limit may not fully protect against the risk of cancer due to nitrite exposure.

ppm = parts per million

All test results

Date Result