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EWG's Tap Water Database — 2021 UPDATE

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Cyanide

City of Tucson

Cyanide is a toxic chemical that causes central nervous system and thyroid toxicity. Water contamination is generally the result of metal mining and chemical industry waste, runoff from agriculture and road salts used for melting ice.

MORE ABOUT THIS CONTAMINANT

 

204

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014N/A00N/A
2015N/A00N/A
2016ND1090ND
2017N/A00N/A
2018N/A00N/A
2019ND950ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 150 ppb

The EWG Health Guideline of 150 ppb for cyanide 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 harm to the brain and nervous system.

EPA Maximum Contaminant
Level (MCL) 200 ppb

The legal limit for cyanide, established in 1992, was based on a 1955 toxicity study conducted in laboratory animals. This limit does not include any additional consideration of children’s health.

ppb = parts per billion

All test results

Date Lab ID Result
2016-01-11201601120497IND
2016-01-11201601120501IND
2016-01-11201601120503IND
2016-01-12201601130583IND
2016-01-12201601130585IND
2016-01-12201601130587IND
2016-01-12201601130589IND
2016-01-12201601130591IND
2016-01-13201601140527IND
2016-01-13201601140529IND
2016-01-13201601140531IND
2016-01-14201601200633IND
2016-01-14201601200650IND
2016-01-14201601200652IND
2016-01-14201601200655IND
2016-01-19201601210560IND
2016-01-19201601210577IND
2016-01-19201601210594IND
2016-01-19201601210596IND
2016-01-19201601210601IND
2016-01-20201601220050IND
2016-01-20201601220052IND
2016-01-20201601220054IND
2016-01-20201601220056IND
2016-01-20201601220058IND
2016-01-21201601260403IND
2016-01-21201601260405IND
2016-01-21201601260407IND
2016-01-21201601260409IND
2016-01-21201601260411IND
2016-01-25201601270689IND
2016-01-25201601270691IND
2016-01-25201601270693IND
2016-01-25201601270696IND
2016-01-2520161270686IND
2016-01-26201601280323IND
2016-01-26201601280327IND
2016-01-26201601280329IND
2016-01-26201601280331IND
2016-01-27201601290325IND
2016-01-27201601290335IND
2016-01-27201601290347IND
2016-01-27201601290350IND
2016-01-28201602020389IND
2016-01-28201602020391IND
2016-01-28201602020393IND
2016-01-28201602020468IND
2016-02-012016020030697IND
2016-02-01201602030693IND
2016-02-01201602030695IND
2016-02-02201602040362IND
2016-02-02201602040364IND
2016-02-02201602040366IND
2016-02-02201602040368IND
2016-02-02201602040370IND
2016-02-03201602050164IND
2016-02-032016020550166IND
2016-02-04201602090778IND
2016-02-04201602090780IND
2016-02-04201602090782IND
2016-02-04201602090784IND
2016-02-08201602100699IND
2016-02-08201602100702IND
2016-02-082016021007071ND
2016-02-09201602110490IND
2016-02-09201602110492IND
2016-02-09201602110494IND
2016-02-09201602110496IND
2016-02-10201602120207IND
2016-02-10201602120209IND
2016-02-10201602120211IND
2016-02-11201602170609IND
2016-02-11201602170834IND
2016-02-11201602170855IND
2016-02-11201602170857IND
2016-02-11201602170861IND
2016-02-16201602180558IND
2016-02-16201602180560IND
2016-02-17201602190297IND
2016-02-17201602190299IND
2016-02-18201602230669IND
2016-02-23201602270248IND
2016-02-23201602270250IND
2016-02-23201602270252IND
2016-02-24201602270255IND
2016-02-24201602270257IND
2016-02-24201602270259IND
2016-02-25201603010761IND
2016-02-29201603020593IND
2016-02-29201603020594IND
2016-03-01201603030258IND
2016-03-02201603040297IND
2016-03-07201603090501IND
2016-03-10201603150105IND
2016-03-10201603150108IND
2016-04-20201604220232IND
2016-04-27201604290171IND
2016-04-28201605030471IND
2016-04-28201605030472IND
2016-04-28201605030473IND
2016-05-02201605040691IND
2016-05-03201605060246IND
2016-05-05201605100253IND
2016-05-31201606020546IND
2016-05-31201606020548IND
2016-06-02201606070240 IND
2016-06-142016060160587IND
2016-06-16201606210150IND
2016-10-04201610060217IND
2019-03-19201903210355IND
2019-04-01L190499-02ND
2019-04-01L190499-03ND
2019-04-01L190499-05ND
2019-04-01L190499-06ND
2019-04-04L190541-01ND
2019-04-11L190512-01ND
2019-04-11L190512-02ND
2019-04-11L190512-03ND
2019-04-11L190512-04ND
2019-04-15L190597-01ND
2019-04-15L190597-02ND
2019-04-15L190597-03ND
2019-04-15L190597-04ND
2019-04-17L190610-01ND
2019-04-17L190610-03ND
2019-04-18L190624-01ND
2019-04-18L190624-02ND
2019-04-18L190624-03ND
2019-04-23L190640-01ND
2019-04-23L190640-02ND
2019-04-23L190640-03ND
2019-04-23L190640-04ND
2019-04-24L190645-02ND
2019-04-24L190645-03ND
2019-04-25L190648-01ND
2019-04-25L190648-03ND
2019-04-30L190670-01ND
2019-04-30L190670-02ND
2019-05-01L190678-02ND
2019-05-01L190678-03ND
2019-05-01L190678-04ND
2019-05-02L190690-01ND
2019-05-02L190690-03ND
2019-05-06L190704-03ND
2019-05-07L190712-01ND
2019-05-07L190712-02ND
2019-05-07L190712-03ND
2019-05-08L190725-01ND
2019-05-08L190725-02ND
2019-05-09L190728-01-20131ND
2019-05-13L190741-01-20131ND
2019-05-13L190741-02-20131ND
2019-05-14L190748-02-20131ND
2019-05-15L190761-01-20131ND
2019-05-15L190761-02-20131ND
2019-05-15L190761-03-20131ND
2019-05-20L190783-02-20131ND
2019-05-20L190783-03-20131ND
2019-05-28L190813-01-06260ND
2019-05-28L190813-02-06260ND
2019-05-28L190813-03-06260ND
2019-05-28L190813-04-06260ND
2019-05-30L190835-02-06260ND
2019-05-30L190835-03-06260ND
2019-05-30L190835-04-06260ND
2019-05-30L190835-05-06260ND
2019-05-30L190835-06-06260ND
2019-06-03L190837-01-06260ND
2019-06-03L190837-02-06260ND
2019-06-03L190837-03-06260ND
2019-06-03L190837-04-06260ND
2019-06-03L190837-05-06260ND
2019-06-04L190851-01-06281ND
2019-06-04L190851-03-06281ND
2019-06-04L190851-04-06281ND
2019-06-04L190851-05-06281ND
2019-06-06L190879-01-06281ND
2019-06-06L190879-02-06281ND
2019-06-06L190879-03-06281ND
2019-06-06L190879-04-06281ND
2019-06-06L190879-05-06281ND
2019-06-11L190893-01-07081ND
2019-06-11L190893-02-07081ND
2019-06-11L190893-03-07081ND
2019-06-11L190893-04-07081ND
2019-06-13L190907-01-07081ND
2019-06-13L190907-02-07081ND
2019-06-13L190907-03-07081ND
2019-06-13L190907-04-07081ND
2019-06-25L190968-01-07081ND
2019-06-27L190983-01-08131ND
2019-08-20L191266-01-10011ND
2019-08-22L191282-01-10011ND
2019-08-22L191282-02-10011ND
2019-09-09L191400-01-10011ND
2019-09-09L191400-02-10011ND
2019-09-10L191408-01-10011ND
2019-09-11L191425-01-10011ND
2019-09-11L191425-02-10011ND
2019-09-11L191425-03-10011ND
2019-09-12L191433-01-10011ND
2019-09-16L191452-01-10021ND
2019-11-19L191822-01-01071ND
2019-11-20L191829-01-01071ND