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EWG's Tap Water Database — 2021 UPDATE

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Manganese

Rancho California Water District

Manganese is a naturally occurring element that is common in food and drinking water. Excessive manganese exposures may impair children's attention, memory and intellectual capacity. Click here to read more about manganese.

MORE ABOUT THIS CONTAMINANT

 

198

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20143.29 ppb172ND - 30.0 ppb
2015ND250ND
2016ND100ND
20172.00 ppb232ND - 25.0 ppb
2018ND310ND
20191.41 ppb8132ND - 16.0 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 100 ppb

The EWG Health Guideline of 100 ppb for manganese was defined by the state of Minnesota as a health risk limit, the concentration of a contaminant that can be consumed with little or no risk to health. This health guideline protects against harm to the brain and nervous system.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-164790-090-1039ND
2014-04-024790-084-1000ND
2014-04-024790-085-1030ND
2014-04-024790-086-1100ND
2014-04-034790-043-1015ND
2014-04-094790-042-1122ND
2014-05-284790-143-0930ND
2014-06-034790-025-0855ND
2014-07-104790-024-0840ND
2014-08-064790-143-0905ND
2014-08-074790-040-1010ND
2014-08-074790-095-0905ND
2014-09-044790-059-093530.0 ppb
2014-10-024790-029-0940ND
2014-10-024790-041-1018ND
2014-10-094790-047-100026.0 ppb
2014-12-094790-019-1000ND
2015-01-294790-142-1030ND
2015-02-204790-034-0945ND
2015-03-054790-028-0932ND
2015-03-114790-048-1048ND
2015-04-084790-046-0858ND
2015-04-164790-017-1030ND
2015-04-214790-018-0930ND
2015-04-224790-053-1200ND
2015-04-224790-142-1015ND
2015-05-064790-143-1050ND
2015-05-144790-097-1145ND
2015-06-024790-045-1202ND
2015-06-024790-051-1122ND
2015-07-074790-015-1000ND
2015-07-144790-142-0000ND
2015-08-054790-143-1135ND
2015-08-074790-027-0840ND
2015-09-094790-058-1017ND
2015-09-104790-071-1113ND
2015-10-064790-065-1045ND
2015-10-144790-142-1045ND
2015-11-044790-035-1240ND
2015-11-044790-143-0955ND
2015-12-094790-038-0955ND
2015-12-094790-046-0925ND
2016-01-134790-044-0900ND
2016-01-204790-142-1030ND
2016-02-294790-150-1830ND
2016-03-154790-037-1200ND
2016-04-144790-142-1100ND
2016-05-114790-036-1230ND
2016-07-064790-031-1115ND
2016-07-254790-012-1230ND
2016-07-274790-142-1130ND
2016-11-094790-153-1110ND
2017-01-184790-090-1120ND
2017-02-034790-153-1050ND
2017-03-234790-142-1055ND
2017-04-114790-042-1045ND
2017-04-114790-043-1000ND
2017-04-114790-084-0940ND
2017-04-114790-085-104021.0 ppb
2017-04-124790-142-1030ND
2017-04-274790-086-1025ND
2017-05-044790-153-1010ND
2017-06-074790-025-0920ND
2017-07-114790-024-0945ND
2017-07-134790-142-1035ND
2017-08-044790-040-0845ND
2017-08-094790-095-1000ND
2017-08-104790-153-1215ND
2017-09-014790-150-0930ND
2017-09-284790-059-094325.0 ppb
2017-10-114790-041-1107ND
2017-10-174790-029-1101ND
2017-11-084790-150-1445ND
2017-11-224790-151-1100ND
2017-12-134790-019-1038ND
2018-01-044790-142-1242ND
2018-02-074790-034-0923ND
2018-02-074790-150-1242ND
2018-02-074790-151-1148ND
2018-03-074790-035-1050ND
2018-03-154790-018-1125ND
2018-03-154790-048-1057ND
2018-04-134790-017-1000ND
2018-04-134790-053-1205ND
2018-04-254790-152-1135ND
2018-05-034790-051-1020ND
2018-05-034790-150-1130ND
2018-05-034790-151-1235ND
2018-05-184790-097-0918ND
2018-05-234790-047-1004ND
2018-06-074790-045-1100ND
2018-07-174790-152-1045ND
2018-07-184790-015-0901ND
2018-08-094790-151-1000ND
2018-08-144790-150-0914ND
2018-08-154790-027-1029ND
2018-09-114790-071-0855ND
2018-09-134790-051-1035ND
2018-10-034790-152-1030ND
2018-10-164790-065-0900ND
2018-10-174790-155-1240ND
2018-11-064790-150-0957ND
2018-11-064790-151-1116ND
2018-11-274790-143-0946ND
2018-12-144790-038-0815ND
2018-12-174790-046-1210ND
2019-01-094790-152-1100ND
2019-01-094790-155-0930ND
2019-02-124790-153-1201ND
2019-02-194790-150-0958ND
2019-02-194790-151-0841ND
2019-03-264790-037-0950ND
2019-04-024790-155-1115ND
2019-04-03B9D0623-01ND
2019-04-03B9D0623-02ND
2019-04-03B9D0623-030.420 ppb
2019-04-03B9D0623-04ND
2019-04-03B9D0623-050.490 ppb
2019-04-03B9D0623-06ND
2019-04-03B9D0623-07ND
2019-04-03B9D0623-08ND
2019-04-03B9D0623-09ND
2019-04-03B9D0623-10ND
2019-04-03B9D0623-116.00 ppb
2019-04-03B9D0623-121.50 ppb
2019-04-03B9D0623-130.440 ppb
2019-04-03B9D0623-141.50 ppb
2019-04-04B9D0901-01ND
2019-04-04B9D0901-023.40 ppb
2019-04-04B9D0901-03ND
2019-04-04B9D0901-04ND
2019-04-04B9D0901-051.000 ppb
2019-04-04B9D0901-060.910 ppb
2019-04-08B9D1144-010.560 ppb
2019-04-08B9D1144-02ND
2019-04-09B9D1394-010.620 ppb
2019-04-09B9D1394-029.70 ppb
2019-04-09B9D1394-0311.0 ppb
2019-04-24B9D3512-011.70 ppb
2019-04-29B9D3946-018.00 ppb
2019-04-30B9D4073-015.80 ppb
2019-05-014790-036-1015ND
2019-05-074790-012-0831ND
2019-05-154790-044-0955ND
2019-06-18B9F2204-01ND
2019-07-014790-031-1052ND
2019-07-11B9G1636-01ND
2019-07-11B9G1636-0211.0 ppb
2019-07-224790-155-0820ND
2019-08-284790-161-0829ND
2019-09-054790-161-0953ND
2019-10-02B9J0342-01ND
2019-10-02B9J0342-020.610 ppb
2019-10-02B9J0342-03ND
2019-10-02B9J0342-040.800 ppb
2019-10-02B9J0342-05ND
2019-10-03B9J0578-01ND
2019-10-03B9J0578-020.420 ppb
2019-10-03B9J0578-03ND
2019-10-03B9J0578-04ND
2019-10-03B9J0578-05ND
2019-10-03B9J0578-060.870 ppb
2019-10-03B9J0578-085.90 ppb
2019-10-03B9J0578-070.730 ppb
2019-10-03B9J0578-09ND
2019-10-04B9J0774-01ND
2019-10-04B9J0774-03ND
2019-10-04B9J0774-02ND
2019-10-04B9J0774-04ND
2019-10-04B9J0774-05ND
2019-10-04B9J0774-06ND
2019-10-04B9J0774-072.30 ppb
2019-10-04B9J0774-08ND
2019-10-07B9J0984-014.80 ppb
2019-10-07B9J0984-0210.00 ppb
2019-10-08B9J1214-012.30 ppb
2019-10-08B9J1214-020.460 ppb
2019-10-08B9J1214-03ND
2019-10-09B9J1394-02ND
2019-10-09B9J1394-010.580 ppb
2019-10-09B9J1394-031.40 ppb
2019-10-09B9J1394-0416.0 ppb
2019-10-104790-161-1107ND
2019-11-064790-161-1231ND
2019-12-11B9L1664-01ND
2019-12-164790-161-1246ND
2019-12-19B9L2851-092.80 ppb
2020-01-15C0A1427-01ND
2020-01-15C0A1427-023.00 ppb
2020-04-01C0D0121-01ND
2020-04-01C0D0121-023.80 ppb
2020-04-01C0D0121-030.580 ppb
2020-07-16C0G2402-010.930 ppb
2020-08-26C0H3473-011.20 ppb
2020-10-14C0J1951-01ND
2020-10-14C0J1951-020.490 ppb
2020-10-14C0J1951-03ND
2020-12-17C0L2775-011.70 ppb