Nitrate and nitrite
Carson City Public Works
Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 1.27 ppm | 37 | 31 | ND - 6.70 ppm |
2015 | 1.14 ppm | 38 | 29 | ND - 8.30 ppm |
2016 | 1.13 ppm | 29 | 23 | ND - 6.50 ppm |
2017 | 1.31 ppm | 37 | 32 | ND - 5.50 ppm |
2018 | 0.824 ppm | 21 | 16 | ND - 7.30 ppm |
2019 | 1.20 ppm | 17 | 14 | ND - 6.43 ppm |
ppm = parts per million
State and national drinking water standards and health guidelines
EWG Health Guideline 0.14 ppm
The health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.
EPA Maximum Contaminant
Level (MCL) 10 ppm
ppm = parts per million
All test results
Date | Lab ID | Result |
---|---|---|
2014-01-14 | 140012 | 1.38 ppm |
2014-01-28 | 140027 | 0.680 ppm |
2014-02-24 | 140048 | 0.680 ppm |
2014-03-26 | 201403270180 | 1.000 ppm |
2014-04-29 | 140138 | 4.83 ppm |
2014-04-29 | 140137 | 0.600 ppm |
2014-05-21 | 140166 | 0.660 ppm |
2014-05-27 | 201405280593-N | ND |
2014-06-19 | 140211 | 0.710 ppm |
2014-06-24 | 201406250107 | 0.530 ppm |
2014-06-24 | 201406250106 | 2.80 ppm |
2014-06-24 | 201406250103 | 2.40 ppm |
2014-06-24 | 201406250104 | 6.70 ppm |
2014-06-24 | 201406250105 | 0.940 ppm |
2014-06-24 | 201406250108 | 0.330 ppm |
2014-06-24 | 201406250102 | 0.250 ppm |
2014-06-25 | 201406270015 | ND |
2014-06-25 | 201406270017 | 2.00 ppm |
2014-06-25 | 201406270018 | ND |
2014-06-25 | 201406270016 | 0.220 ppm |
2014-06-25 | 201406270012 | 1.60 ppm |
2014-06-25 | 201406270013 | 0.380 ppm |
2014-06-25 | 201406270011 | 0.510 ppm |
2014-06-25 | 201406270014 | 0.140 ppm |
2014-07-01 | 201407020381 | 1.10 ppm |
2014-07-01 | 201407020382 | 2.20 ppm |
2014-07-01 | 201407020380 | ND |
2014-07-08 | 201407090717 | 3.20 ppm |
2014-07-30 | 201407310264 | 1.70 ppm |
2014-07-30 | 1407796-001 | 1.20 ppm |
2014-07-30 | 1407797-001 | 0.420 ppm |
2014-08-20 | 1408542-001 | 0.510 ppm |
2014-09-04 | 201409050275 | ND |
2014-09-10 | 1409291-002 | 1.70 ppm |
2014-09-10 | 1409291-001 | 0.480 ppm |
2014-09-23 | 1409696-001 | ND |
2014-10-29 | 1410796-001 | 5.30 ppm |
2015-03-26 | 201503270323-N | 6.90 ppm |
2015-04-21 | 1504596-001-N | 0.350 ppm |
2015-05-27 | 150527-001 | 0.310 ppm |
2015-06-24 | 1506697-001 | 0.450 ppm |
2015-06-29 | 201506300124-IOC | 0.450 ppm |
2015-06-29 | 201506300177-IOC | ND |
2015-06-30 | 1507049-001 | 1.70 ppm |
2015-07-14 | 201507150299 | ND |
2015-07-15 | 201507160441 | 2.30 ppm |
2015-07-15 | 201507160327 | 0.400 ppm |
2015-07-15 | 201507160255 | ND |
2015-07-21 | 201507220179 | ND |
2015-07-27 | 201507280085 | ND |
2015-07-27 | 201507280084 | 1.90 ppm |
2015-07-27 | 201507280083 | ND |
2015-07-27 | 201507280086 | 0.360 ppm |
2015-07-29 | 201507300215 | 0.400 ppm |
2015-07-29 | 201507300214 | 0.530 ppm |
2015-07-29 | 201507300213 | 2.40 ppm |
2015-07-29 | 201507300212 | 0.830 ppm |
2015-07-29 | 201507300216 | 2.00 ppm |
2015-07-29 | 201507300209 | 0.280 ppm |
2015-08-10 | 201508110263 | ND |
2015-08-12 | 1508331-001 | 0.250 ppm |
2015-08-13 | 201508140259 | 0.780 ppm |
2015-08-13 | 201508140254 | 0.430 ppm |
2015-09-15 | 201509160733 | ND |
2015-09-15 | 201509160729 | 5.20 ppm |
2015-09-15 | 201509160734 | 1.20 ppm |
2015-09-15 | 201509020134 | 0.870 ppm |
2015-09-23 | 1509655-001 | ND |
2015-09-23 | 201509240291 | 1.000 ppm |
2015-09-23 | 1509654-001 | 0.360 ppm |
2015-10-21 | 1510593-001 | 1.40 ppm |
2015-10-21 | 1510592-001 | 0.670 ppm |
2015-11-18 | 1511475-001 | 0.720 ppm |
2015-12-09 | 1512296-001 | 0.620 ppm |
2015-12-16 | 201512170135 | 8.30 ppm |
2016-01-20 | 1601433-001 | 0.300 ppm |
2016-04-20 | 1604522-001 | ND |
2016-06-15 | 160615-001 | 0.630 ppm |
2016-06-22 | 201606230265 | ND |
2016-06-22 | 201606230271 | 0.810 ppm |
2016-06-23 | 160623-007 | 1.20 ppm |
2016-06-28 | 201606290224 | ND |
2016-06-28 | 201606290218 | ND |
2016-06-28 | 201606290223 | ND |
2016-06-28 | 201606290222 | 1.80 ppm |
2016-06-28 | 201606290220 | 0.370 ppm |
2016-06-28 | 201606290219 | 0.400 ppm |
2016-06-28 | 201606290221 | 1.20 ppm |
2016-07-13 | 160713-007 | 0.570 ppm |
2016-08-10 | 201608120041 | 0.200 ppm |
2016-08-10 | 201608120037 | 0.510 ppm |
2016-08-10 | 201608120040 | 3.00 ppm |
2016-08-10 | 201608120039 | 1.40 ppm |
2016-08-10 | 201608120038 | ND |
2016-08-16 | 201608170231 | 0.520 ppm |
2016-08-16 | 201608170233 | 4.70 ppm |
2016-08-16 | 201608170232 | 3.60 ppm |
2016-09-07 | 160907_005 | 0.600 ppm |
2016-09-21 | 160921-007 | 1.30 ppm |
2016-09-21 | 1609658-002 | 0.950 ppm |
2016-10-19 | 1610613-001 | 0.790 ppm |
2016-11-09 | 161109_006 | 0.700 ppm |
2016-12-22 | 1612713-001 | 6.50 ppm |
2016-12-28 | 1612810-001 | 0.680 ppm |
2017-01-31 | 1701686-001 | 0.380 ppm |
2017-02-15 | 170215-004 | 0.400 ppm |
2017-03-21 | 170321-020 | 0.450 ppm |
2017-04-26 | 170426_001 | 0.800 ppm |
2017-05-15 | 201705160867 | 0.160 ppm |
2017-05-15 | 201705160571 | ND |
2017-05-15 | 201705160632 | 0.500 ppm |
2017-05-15 | 201705160541 | 1.000 ppm |
2017-05-16 | 201705170491 | ND |
2017-05-16 | 201705170304 | 0.340 ppm |
2017-05-16 | 201705170782 | 0.270 ppm |
2017-05-17 | 1705493-001 | 0.320 ppm |
2017-05-23 | 201705240962 | 0.940 ppm |
2017-05-23 | 201705240769 | ND |
2017-05-25 | 201705260591 | 4.70 ppm |
2017-05-25 | 201705260596 | 2.80 ppm |
2017-06-14 | 1706415-001 | 5.50 ppm |
2017-06-14 | 1706414-001 | 0.750 ppm |
2017-07-05 | 201707060865 | 3.50 ppm |
2017-07-19 | 170719-15 | 0.730 ppm |
2017-07-20 | 201707210331 | 2.90 ppm |
2017-07-20 | 201707210328 | 4.50 ppm |
2017-07-25 | 201707260765 | 1.90 ppm |
2017-07-25 | 201707260764 | 3.50 ppm |
2017-07-26 | 201707260490 | 2.10 ppm |
2017-08-01 | 201708020897 | 0.410 ppm |
2017-08-01 | 201708020922 | 0.520 ppm |
2017-08-01 | 201708021373 | ND |
2017-08-01 | 201708021436 | ND |
2017-08-23 | 170823_002 | 0.420 ppm |
2017-08-28 | 201708290217 | 1.90 ppm |
2017-09-06 | 170906_009 | 0.500 ppm |
2017-09-27 | 170927-003 | 2.40 ppm |
2017-10-25 | 1710819-001 | 0.830 ppm |
2017-11-20 | 1711685-001 | 0.930 ppm |
2017-12-13 | 1712436-001 | 1.000 ppm |
2017-12-21 | 1712678-001 | 1.20 ppm |
2018-03-21 | 1803667-001 | 0.420 ppm |
2018-03-28 | 1803879-001 | 0.810 ppm |
2018-04-25 | 18041332-01 | 0.300 ppm |
2018-04-25 | 1804812-001 | 0.430 ppm |
2018-05-03 | 201805040323A | 0.560 ppm |
2018-05-03 | 201805040327 | 1.20 ppm |
2018-05-03 | 201805040433 | 0.530 ppm |
2018-05-15 | 201805160828 | ND |
2018-05-15 | 201805161039 | ND |
2018-05-30 | 1805894-001 | ND |
2018-05-30 | 201805310461 | ND |
2018-05-30 | 201805310480 | 2.70 ppm |
2018-05-30 | 201805310569 | ND |
2018-05-31 | 1805910-001 | 0.420 ppm |
2018-05-31 | 201806010522 | 0.410 ppm |
2018-06-20 | 1806655-001 | 0.420 ppm |
2018-07-18 | 1807631-001 | 0.710 ppm |
2018-07-23 | 201807240376 | 0.180 ppm |
2018-08-22 | 1808748-001 | 0.440 ppm |
2018-09-12 | 18090436-001 | 0.480 ppm |
2018-09-18 | 18090654-002 | 7.30 ppm |
2019-02-20 | 19020481-001 | 0.410 ppm |
2019-04-24 | 19040743-001 | 0.390 ppm |
2019-05-09 | 201905110146 | 0.470 ppm |
2019-05-22 | 19050682-001 | 0.400 ppm |
2019-06-19 | 19060645-001 | 0.370 ppm |
2019-06-24 | 201906250202A | ND |
2019-07-24 | 19070940-001 | 0.380 ppm |
2019-08-22 | 201908230324 | 1.90 ppm |
2019-09-24 | 201909250291 | 0.340 ppm |
2019-09-25 | 201909260166 | 1.000 ppm |
2019-09-26 | 190926-002 | ND |
2019-09-26 | 190926-003 | 6.43 ppm |
2019-10-30 | 191030-004 | 0.780 ppm |
2019-11-20 | 191120-001 | ND |
2019-12-23 | 201912260084 | 0.850 ppm |
2019-12-30 | 19120820-001 | 0.800 ppm |
2019-12-30 | 19120825-001 | 5.90 ppm |