The Power of Information

National Drinking Water Database


San Gabriel Valley WC - Fontana Utilities - Los Angeles, CA


Serves 102,599 people

Nitrite

Nitrite is a chemical that enters water from fertilizer runoff, leaching septic tanks, and erosion of natural deposits.
 
This Drinking Water System
Test Days Exceeding Health GuidelinesDefinition of what this is
0 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
93 days
Tests ConductedNumber of individual tests done for this contaminant
348 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
NitriteNitrite is a chemical that enters water from fertilizer runoff, leaching septic tanks, and erosion of natural deposits.<0.01 ppm
0.44 ppm
No
1 ppm
No
1 ppm
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 Nitrite

Health Based Limits for Nitrite

StandardDescriptionLevel
Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.1 ppm
Maximum Contaminant Limit Goal (MCLG)A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.1 ppm
California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.1 ppm
Children's health-based limit for 1-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for up to one day of exposure. The One-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.1 ppm
Children's health-based limit for 10-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic effects for up to ten days of exposure. The Ten-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.1 ppm

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2009-03-100 ppm550 ppm
2009-03-040 ppm330 ppm
2009-02-250 ppm110 ppm
2009-02-180 ppm660 ppm
2009-02-040 ppm550 ppm
2008-10-290 ppm110 ppm
2008-10-150 ppm330 ppm
2008-07-080 ppm660 ppm
2008-06-110 ppm440 ppm
2008-06-040 ppm220 ppm
2008-05-280 ppm330 ppm
2008-05-210 ppm330 ppm
2008-04-090 ppm330 ppm
2008-04-020 ppm110 ppm
2008-03-270 ppm110 ppm
2008-03-190 ppm440 ppm
2008-03-120 ppm660 ppm
2008-03-050 ppm220 ppm
2007-11-280 ppm110 ppm
2007-11-130 ppm110 ppm
2007-10-310 ppm880 ppm
2007-10-100 ppm110 ppm
2007-10-030 ppm330 ppm
2007-09-120 ppm330 ppm
2007-09-110 ppm440 ppm
2007-08-290 ppm770 ppm
2007-08-220 ppm330 ppm
2007-08-150 ppm660 ppm
2007-07-250 ppm220 ppm
2007-07-020 ppm110 ppm
2007-06-270 ppm12120 ppm
2007-05-170 ppm220 ppm
2007-05-160 ppm220 ppm
2007-05-090 ppm880 ppm
2007-04-250 ppm220 ppm
2007-03-280.44 ppm210 to 0.88 ppm
2007-03-210 ppm110 ppm
2007-03-140 ppm330 ppm
2006-12-130 ppm550 ppm
2006-12-080 ppm660 ppm
2006-12-070 ppm990 ppm
2006-12-050 ppm110 ppm
2006-11-270 ppm440 ppm
2006-09-270 ppm110 ppm
2006-09-210 ppm440 ppm
2006-09-190 ppm550 ppm
2006-09-180 ppm10100 ppm
2006-09-150 ppm660 ppm
2006-09-110 ppm110 ppm
2006-07-050 ppm110 ppm
2006-06-270 ppm110 ppm
2006-06-200 ppm110 ppm
2006-06-140 ppm550 ppm
2006-06-120 ppm10100 ppm
2006-06-080 ppm11110 ppm
2006-03-220 ppm330 ppm
2006-03-170 ppm440 ppm
2006-03-160 ppm14140 ppm
2006-03-150 ppm220 ppm
2006-01-260 ppm110 ppm
2005-12-270 ppm220 ppm
2005-12-210 ppm220 ppm
2005-12-150 ppm330 ppm
2005-12-130 ppm110 ppm
2005-12-050 ppm220 ppm
2005-12-010 ppm330 ppm
2005-09-300 ppm110 ppm
2005-09-220 ppm220 ppm
2005-09-130 ppm220 ppm
2005-09-020 ppm110 ppm
2005-08-300 ppm550 ppm
2005-08-090 ppm110 ppm
2005-08-050 ppm110 ppm
2005-08-020 ppm110 ppm
2005-07-290 ppm110 ppm
2005-07-220 ppm110 ppm
2005-07-200 ppm110 ppm
2005-07-190 ppm220 ppm
2005-07-010 ppm110 ppm
2005-05-230 ppm110 ppm
2005-05-130 ppm220 ppm
2005-03-290 ppm17170 ppm
2005-03-180 ppm110 ppm
2005-03-170 ppm220 ppm
2004-12-080 ppm330 ppm
2004-08-260 ppm770 ppm
2004-08-250 ppm330 ppm
2004-07-150 ppm220 ppm
2004-06-240 ppm440 ppm
2004-06-230 ppm23230 ppm
2004-06-170 ppm440 ppm
2004-04-290 ppm990 ppm
2004-01-260 ppm110 ppm