Manganese
California Water Service (CWS) - Los Altos Suburban
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.
137
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 0.354 ppb | 35 | 5 | ND - 6.40 ppb |
| 2019 | 0.931 ppb | 34 | 11 | ND - 9.60 ppb |
| 2020 | ND | 13 | 0 | ND |
| 2021 | 0.287 ppb | 23 | 1 | ND - 6.60 ppb |
| 2022 | 0.900 ppb | 17 | 6 | ND - 6.30 ppb |
| 2023 | 0.0867 ppb | 15 | 1 | ND - 1.30 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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 |
|---|---|---|
| 2018-02-12 | CA4310001_013_013-201802121230 | ND |
| 2018-02-12 | CA4310001_021_021-201802121415 | ND |
| 2018-03-12 | CA4310001_007_007-201803121005 | ND |
| 2018-03-20 | CA4310001_032_032-201803201340 | ND |
| 2018-03-20 | CA4310001_035_035-201803201351 | ND |
| 2018-03-20 | CA4310001_032_032-201803201345 | ND |
| 2018-05-08 | CA4310001_018_018-201805081335 | ND |
| 2018-05-16 | CA4310001_023_023-201805161020 | ND |
| 2018-06-06 | CA4310001_032_032-201806061325 | ND |
| 2018-06-06 | CA4310001_035_035-201806061310 | ND |
| 2018-07-10 | CA4310001_008_008-201807101305 | ND |
| 2018-08-07 | CA4310001_007_007-201808071015 | ND |
| 2018-08-08 | CA4310001_022_022-201808081335 | ND |
| 2018-08-13 | B8H1635-04 | ND |
| 2018-08-13 | B8H1635-01 | 3.10 ppb |
| 2018-08-13 | B8H1635-02 | 1.40 ppb |
| 2018-08-13 | B8H1635-03 | ND |
| 2018-08-14 | B8H1911-01 | 0.680 ppb |
| 2018-08-21 | B8H2749-01 | ND |
| 2018-08-21 | B8H2749-02 | 6.40 ppb |
| 2018-08-22 | B8H2946-01 | ND |
| 2018-08-22 | B8H2946-03 | ND |
| 2018-08-22 | B8H2946-02 | ND |
| 2018-09-18 | CA4310001_057_057-201809181225 | ND |
| 2018-09-18 | CA4310001_032_032-201809181315 | ND |
| 2018-09-18 | CA4310001_032_032-201809181320 | ND |
| 2018-09-18 | CA4310001_035_035-201809181347 | ND |
| 2018-09-18 | CA4310001_032_032-201809181314 | ND |
| 2018-09-18 | CA4310001_035_035-201809181345 | ND |
| 2018-09-20 | B8I2660-01 | 0.810 ppb |
| 2018-10-10 | CA4310001_002_002-201810101431 | ND |
| 2018-11-06 | B8K0792-05 | ND |
| 2018-12-04 | CA4310001_035_035-201812041435 | ND |
| 2018-12-04 | CA4310001_032_032-201812041454 | ND |
| 2018-12-26 | CA4310001_020_020-201812261420 | ND |
| 2019-02-04 | B9B0398-02 | ND |
| 2019-02-04 | B9B0398-01 | 0.430 ppb |
| 2019-02-05 | B9B0596-01 | ND |
| 2019-02-06 | B9B0830-01 | 1.90 ppb |
| 2019-02-12 | B9B1500-01 | ND |
| 2019-02-12 | B9B1500-02 | 0.930 ppb |
| 2019-02-12 | B9B1500-03 | 0.690 ppb |
| 2019-02-12 | B9B1500-04 | 9.30 ppb |
| 2019-02-12 | B9B1500-05 | 1.80 ppb |
| 2019-02-13 | B9B1749-01 | 4.20 ppb |
| 2019-02-20 | B9B2511-01 | ND |
| 2019-02-20 | B9B2511-02 | 0.420 ppb |
| 2019-02-20 | B9B2511-03 | ND |
| 2019-02-20 | B9B2511-04 | 9.60 ppb |
| 2019-02-21 | B9B2619-01 | 1.90 ppb |
| 2019-03-05 | CA4310001_032_032-201903051223 | ND |
| 2019-03-05 | CA4310001_032_032-201903051225 | ND |
| 2019-03-05 | CA4310001_035_035-201903051240 | ND |
| 2019-03-19 | CA4310001_028_028-201903191357 | ND |
| 2019-03-19 | CA4310001_030_030-201903191343 | ND |
| 2019-03-19 | CA4310001_007_007-201903191157 | ND |
| 2019-05-08 | B9E1259-01 | ND |
| 2019-06-05 | CA4310001_032_032-201906051538 | ND |
| 2019-06-05 | CA4310001_035_035-201906051551 | ND |
| 2019-06-05 | CA4310001_032_032-201906051539 | ND |
| 2019-06-18 | CA4310001_024_024-201906181336 | ND |
| 2019-08-19 | B9H2683-01 | 0.480 ppb |
| 2019-08-20 | CA4310001_037_037-201908201125 | ND |
| 2019-09-11 | CA4310001_029_029-201909111418 | ND |
| 2019-09-17 | CA4310001_032_032-201909171525 | ND |
| 2019-09-17 | CA4310001_035_035-201909171545 | ND |
| 2019-11-06 | B9K0888-01 | ND |
| 2019-12-03 | CA4310001_032_032-201912031428 | ND |
| 2019-12-03 | CA4310001_035_035-201912031450 | ND |
| 2020-01-14 | CA4310001_010_010-202001141405 | ND |
| 2020-01-14 | CA4310001_011_011-202001141335 | ND |
| 2020-02-03 | C0B0232-01 | ND |
| 2020-03-11 | CA4310001_032_032-202003111202 | ND |
| 2020-03-11 | CA4310001_035_035-202003111235 | ND |
| 2020-05-05 | C0E0672-01 | ND |
| 2020-06-03 | CA4310001_035_035-202006031330 | ND |
| 2020-06-03 | CA4310001_032_032-202006031400 | ND |
| 2020-09-15 | CA4310001_035_035-202009151306 | ND |
| 2020-09-15 | CA4310001_032_032-202009151247 | ND |
| 2020-10-13 | CA4310001_016_016-202010131458 | ND |
| 2020-12-08 | CA4310001_032_032-202012081136 | ND |
| 2020-12-08 | CA4310001_035_035-202012081150 | ND |
| 2021-02-18 | CA4310001_013_013-202102181500 | ND |
| 2021-02-18 | CA4310001_020_020-202102181318 | ND |
| 2021-02-18 | CA4310001_013_013-202102181500 | ND |
| 2021-03-09 | CA4310001_032_032-202103091513 | ND |
| 2021-03-09 | CA4310001_035_035-202103091537 | ND |
| 2021-05-18 | CA4310001_023_023-202105181315 | ND |
| 2021-05-18 | CA4310001_018_018-202105181020 | ND |
| 2021-05-18 | CA4310001_018_018-202105181020 | ND |
| 2021-05-18 | CA4310001_023_023-202105181315 | ND |
| 2021-06-08 | CA4310001_035_035-202106081400 | ND |
| 2021-06-08 | CA4310001_032_032-202106081415 | ND |
| 2021-07-13 | CA4310001_008_008-202107131450 | ND |
| 2021-08-04 | CA4310001_022_022-202108041433 | ND |
| 2021-08-24 | CA4310001_007_007-202108241330 | ND |
| 2021-09-09 | CA4310001_032_032-202109091250 | ND |
| 2021-09-09 | CA4310001_035_035-202109091220 | 6.60 ppb |
| 2021-09-09 | CA4310001_032_032-202109091245 | ND |
| 2021-09-09 | CA4310001_035_035-202109091225 | ND |
| 2021-09-23 | CA4310001_057_057-202109231420 | ND |
| 2021-10-12 | CA4310001_002_002-202110121427 | ND |
| 2021-12-07 | CA4310001_032_032-202112071316 | ND |
| 2021-12-07 | CA4310001_035_035-202112071249 | ND |
| 2021-12-13 | CA4310001_021_021-202112131212 | ND |
| 2022-03-08 | CA4310001_032_032-202203081456 | 2.20 ppb |
| 2022-03-08 | CA4310001_035_035-202203081434 | 6.30 ppb |
| 2022-03-09 | CA4310001_030_030-202203091410 | ND |
| 2022-03-10 | CA4310001_028_028-202203101415 | ND |
| 2022-06-01 | CA4310001_032_032-202206011030 | 1.30 ppb |
| 2022-06-01 | CA4310001_007_007-202206011320 | ND |
| 2022-06-01 | CA4310001_032_032-202206011030 | 2.20 ppb |
| 2022-06-01 | CA4310001_035_035-202206011137 | 2.00 ppb |
| 2022-06-06 | CA4310001_024_024-202206061300 | ND |
| 2022-08-10 | CA4310001_037_037-202208101338 | ND |
| 2022-09-13 | CA4310001_035_035-202209131344 | ND |
| 2022-09-13 | CA4310001_029_029-202209131406 | ND |
| 2022-09-28 | CA4310001_032_032-202209281432 | ND |
| 2022-12-06 | CA4310001_032_032-202212061441 | ND |
| 2022-12-06 | CA4310001_035_035-202212061257 | ND |
| 2022-12-06 | CA4310001_032_032-202212061444 | 1.30 ppb |
| 2022-12-13 | CA4310001_007_007-202212131423 | ND |
| 2023-01-31 | CA4310001_011_011-202301311447 | ND |
| 2023-01-31 | CA4310001_010_010-202301311422 | ND |
| 2023-03-07 | CA4310001_035_035-202303071310 | ND |
| 2023-03-07 | CA4310001_032_032-202303071222 | ND |
| 2023-03-08 | CA4310001_007_007-202303081640 | ND |
| 2023-06-07 | CA4310001_032_032-202306071137 | 1.30 ppb |
| 2023-06-12 | CA4310001_032_032-202306121158 | ND |
| 2023-06-12 | CA4310001_035_035-202306121438 | ND |
| 2023-06-13 | CA4310001_007_007-202306131501 | ND |
| 2023-09-13 | CA4310001_007_007-202309131359 | ND |
| 2023-09-13 | CA4310001_032_032-202309131318 | ND |
| 2023-09-13 | CA4310001_035_035-202309131151 | ND |
| 2023-10-18 | CA4310001_016_016-202310181338 | ND |
| 2023-12-13 | CA4310001_032_032-202312131325 | ND |
| 2023-12-13 | CA4310001_035_035-202312131300 | ND |