The Power of Information

National Drinking Water Database


Metropolitan Utilities District Utilities - Omaha, NE


Serves 506,420 people

Radon

Radon is a radioactive breakdown product of radium and uranium in soil, rock and water; it is often present in groundwater.
 
This Drinking Water System
Test Days Exceeding Health GuidelinesDefinition of what this is
33 days
Test Days Exceeding Legal LimitsNumber of days in which the samples taken in that day exceed the Maximum Contaminant Level (Depending on the contaminant and its MCL, that may or may not trigger an MCL violation. Some MCLs are based on averages spanning several months to a year)
0 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
34 days
Tests ConductedNumber of individual tests done for this contaminant
58 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
RadonRadon is a radioactive breakdown product of radium and uranium in soil, rock and water; it is often present in groundwater.308.81 pCi/L
520.5 pCi/L
Yes
1.5 pCi/L
Legal at any levelThis is the Federal Limit. State Limits may be lower.
NOTE: Each dot in the above graph represents one month.
* Water utilities are noted as exceeding the legal limit if any test is above the maximum contaminant level (MCL). Most MCLs are based on annual averages so exceeding the MCL for one test does not necessarily indicate that the system is out of compliance.

Health Based and Legal Limits for Radon

Health Based Limits for Radon

StandardDescriptionLevel
One in one million (10-6) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 1,000,000. Source: U.S. Environmental Protection Agency.1.5 pCi/L
One in ten thousand (10-4) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 10,000. Source: U.S. Environmental Protection Agency.150 pCi/L

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2008-05-06354 pCi/L30354 pCi/L
2008-04-090 pCi/L330 pCi/L
2008-04-07280 pCi/L60258 to 302 pCi/L
2005-04-12339 pCi/L10339 pCi/L
2005-04-11202.5 pCi/L20139 to 266 pCi/L
2005-03-15271 pCi/L10271 pCi/L
2005-03-14375 pCi/L10375 pCi/L
2005-03-09261 pCi/L10261 pCi/L
2005-03-08231 pCi/L10231 pCi/L
2005-03-07328 pCi/L10328 pCi/L
2005-03-02286 pCi/L10286 pCi/L
2005-03-01268 pCi/L10268 pCi/L
2005-02-28336 pCi/L10336 pCi/L
2005-02-14408 pCi/L10408 pCi/L
2005-02-08387 pCi/L10387 pCi/L
2004-11-30306 pCi/L20230 to 382 pCi/L
2004-11-16294.5 pCi/L20210 to 379 pCi/L
2004-11-09253 pCi/L10253 pCi/L
2004-11-02358 pCi/L10358 pCi/L
2004-10-26367 pCi/L20355 to 379 pCi/L
2004-10-19323 pCi/L20296 to 350 pCi/L
2004-10-06291 pCi/L20273 to 309 pCi/L
2004-09-29265 pCi/L20200 to 330 pCi/L
2004-09-21364.5 pCi/L20354 to 375 pCi/L
2004-09-13412.5 pCi/L20339 to 486 pCi/L
2004-08-31520.5 pCi/L20486 to 555 pCi/L
2004-08-24269.5 pCi/L20233 to 306 pCi/L
2004-08-17323.5 pCi/L20307 to 340 pCi/L
2004-08-03322.5 pCi/L20230 to 415 pCi/L
2004-07-20233 pCi/L20214 to 252 pCi/L
2004-07-13346.5 pCi/L20298 to 395 pCi/L
2004-06-30497 pCi/L10497 pCi/L
2004-06-22350 pCi/L10350 pCi/L
2004-04-0776 pCi/L1076 pCi/L