Arsenic
Veiola Water Idaho
Arsenic is a potent carcinogen and common contaminant in drinking water. Arsenic causes thousands of cases of cancer each year in the U.S. Click here to read more about arsenic.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 2.88 ppb | 27 | 16 | ND - 17.0 ppb |
| 2019 | 4.40 ppb | 30 | 25 | ND - 18.0 ppb |
| 2020 | 2.12 ppb | 74 | 43 | ND - 15.0 ppb |
| 2021 | 3.06 ppb | 38 | 29 | ND - 15.0 ppb |
| 2022 | 3.01 ppb | 20 | 14 | ND - 15.0 ppb |
| 2023 | 2.48 ppb | 83 | 51 | ND - 16.2 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.004 ppb
The EWG Health Guideline of 0.004 ppb for arsenic was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.
EPA Maximum Contaminant
Level (MCL): 10 ppb
The legal limit for arsenic, established in 2001, was based on costs for arsenic removal, as calculated at the time that the standard was set. This limit does not fully protect against the risk of cancer due to arsenic exposure.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-02-01 | I1804597 | ND |
| 2018-02-05 | I1804986 | ND |
| 2018-02-06 | I1805280 | ND |
| 2018-02-12 | I1806151 | ND |
| 2018-02-12 | I1806152 | 7.20 ppb |
| 2018-03-12 | I1810541 | 17.0 ppb |
| 2018-05-15 | I1821863 | 2.50 ppb |
| 2018-05-15 | I1821851 | ND |
| 2018-05-23 | I1823164 | ND |
| 2018-06-06 | I1825586 | 3.40 ppb |
| 2018-06-06 | I1825584 | 5.40 ppb |
| 2018-06-06 | I1825583 | 5.10 ppb |
| 2018-06-06 | I1825581 | ND |
| 2018-06-21 | I1828646 | 4.00 ppb |
| 2018-06-21 | I1828604 | ND |
| 2018-06-21 | I1828603 | ND |
| 2018-06-21 | I1828606 | 4.60 ppb |
| 2018-06-21 | I1828608 | 3.00 ppb |
| 2018-06-26 | I1829342 | ND |
| 2018-06-26 | I1829345 | 2.20 ppb |
| 2018-06-26 | I1829341 | ND |
| 2018-07-02 | I1830675 | 3.90 ppb |
| 2018-07-02 | I1830578 | 5.50 ppb |
| 2018-07-10 | I1832042 | 4.50 ppb |
| 2018-07-10 | I1832044 | 2.60 ppb |
| 2018-07-18 | I1833964 | 2.60 ppb |
| 2018-08-15 | I1839829 | 4.20 ppb |
| 2019-02-19 | I1907390 | 3.70 ppb |
| 2019-02-19 | I1907388 | 3.10 ppb |
| 2019-02-19 | I1907386 | ND |
| 2019-03-06 | I1909865 | 3.90 ppb |
| 2019-03-06 | I1909868 | 3.10 ppb |
| 2019-03-13 | I1911210 | 2.30 ppb |
| 2019-03-27 | I1913515 | 2.50 ppb |
| 2019-04-17 | I1917321 | 6.40 ppb |
| 2019-04-18 | I1917715 | 2.90 ppb |
| 2019-04-18 | I1917718 | 2.40 ppb |
| 2019-06-12 | I1927972 | ND |
| 2019-06-13 | I1928243 | 4.40 ppb |
| 2019-07-03 | I1932118 | 5.80 ppb |
| 2019-07-03 | I1932258 | 7.00 ppb |
| 2019-07-09 | I1933033 | 4.40 ppb |
| 2019-07-09 | I1933034 | 5.10 ppb |
| 2019-07-10 | I1933346 | ND |
| 2019-07-10 | I1933345 | ND |
| 2019-07-10 | I1933341 | 3.60 ppb |
| 2019-07-16 | I1934434 | 18.0 ppb |
| 2019-07-19 | I1935267 | ND |
| 2019-07-19 | I1935266 | 4.10 ppb |
| 2019-07-23 | I1935756 | 6.20 ppb |
| 2019-07-31 | I1937498 | 7.30 ppb |
| 2019-08-28 | I1942930 | 14.0 ppb |
| 2019-08-28 | I1942932 | 4.00 ppb |
| 2019-09-05 | I1944523 | 8.70 ppb |
| 2019-10-02 | I1949691 | 2.90 ppb |
| 2019-10-09 | I1951015 | 3.70 ppb |
| 2019-10-09 | I1951013 | 2.40 ppb |
| 2020-01-29 | I2004288 | 3.10 ppb |
| 2020-01-29 | I2004289 | 3.70 ppb |
| 2020-01-29 | I2004286 | 2.10 ppb |
| 2020-03-05 | I2010085 | 2.60 ppb |
| 2020-03-05 | I2010083 | ND |
| 2020-03-09 | I2010474 | 5.70 ppb |
| 2020-03-17 | I2012067 | ND |
| 2020-03-17 | I2012065 | ND |
| 2020-05-11 | I2021166 | 5.30 ppb |
| 2020-05-11 | I2021164 | ND |
| 2020-05-11 | I2021167 | 3.90 ppb |
| 2020-05-12 | I2021375 | ND |
| 2020-05-12 | I2021374 | 2.20 ppb |
| 2020-05-12 | I2021372 | ND |
| 2020-05-12 | I2021377 | 4.40 ppb |
| 2020-05-14 | I2022038 | ND |
| 2020-05-27 | I2024180 | 5.90 ppb |
| 2020-05-27 | I2024175 | ND |
| 2020-05-27 | I2024178 | ND |
| 2020-05-27 | I2024179 | ND |
| 2020-06-22 | I2029096 | 4.40 ppb |
| 2020-06-22 | I2029095 | ND |
| 2020-06-22 | I2029093 | ND |
| 2020-06-24 | I2029688 | ND |
| 2020-06-24 | I2029686 | ND |
| 2020-06-24 | I2029684 | 2.00 ppb |
| 2020-06-24 | I2029690 | ND |
| 2020-06-24 | I2029682 | 3.20 ppb |
| 2020-06-24 | I3029683 | ND |
| 2020-06-24 | I2029685 | ND |
| 2020-06-24 | I2029689 | ND |
| 2020-06-25 | I2029968 | ND |
| 2020-06-25 | I2029977 | 2.10 ppb |
| 2020-06-25 | I2029964 | 6.50 ppb |
| 2020-06-25 | I2029963 | 4.00 ppb |
| 2020-06-25 | I2029949 | ND |
| 2020-06-25 | I2029967 | 5.20 ppb |
| 2020-06-25 | I2029961 | ND |
| 2020-06-25 | I2029970 | 2.20 ppb |
| 2020-06-25 | I2029965 | 3.00 ppb |
| 2020-06-25 | I2029962 | 4.60 ppb |
| 2020-06-25 | I2029950 | ND |
| 2020-07-06 | I2031374 | 2.00 ppb |
| 2020-07-06 | I2031372 | ND |
| 2020-07-06 | I2031371 | ND |
| 2020-07-06 | I2031370 | ND |
| 2020-07-06 | I2031368 | 3.00 ppb |
| 2020-07-07 | I2031607 | 2.50 ppb |
| 2020-07-07 | I2031605 | 2.20 ppb |
| 2020-07-07 | I2031604 | 2.20 ppb |
| 2020-07-07 | I2031609 | 2.30 ppb |
| 2020-07-09 | I2032316 | 3.30 ppb |
| 2020-07-09 | I2032320 | 2.70 ppb |
| 2020-07-09 | I2032318 | 15.0 ppb |
| 2020-07-15 | I2033263 | ND |
| 2020-07-15 | I2033262 | 3.90 ppb |
| 2020-07-15 | I2033250 | 2.00 ppb |
| 2020-07-21 | I2034446 | ND |
| 2020-07-21 | I2034450 | 4.10 ppb |
| 2020-07-21 | I203447 | ND |
| 2020-07-22 | I2034798 | 5.90 ppb |
| 2020-07-22 | I2034797 | 2.50 ppb |
| 2020-07-22 | I2034795 | 2.70 ppb |
| 2020-07-28 | I2035874 | ND |
| 2020-07-28 | I2035872 | 2.10 ppb |
| 2020-07-28 | I2035876 | ND |
| 2020-07-29 | I2036180 | 3.40 ppb |
| 2020-07-29 | I2036178 | ND |
| 2020-07-30 | I2036346 | 3.20 ppb |
| 2020-07-30 | I2036345 | 4.10 ppb |
| 2020-07-30 | I2036343 | 2.30 ppb |
| 2020-09-02 | I2043270 | 2.70 ppb |
| 2020-10-13 | I2051252 | 4.80 ppb |
| 2020-10-13 | I2051250 | 2.10 ppb |
| 2021-02-10 | I2106447 | 2.90 ppb |
| 2021-02-10 | I2108444 | 2.00 ppb |
| 2021-02-10 | I2106445 | 2.10 ppb |
| 2021-02-10 | I2106442 | 2.40 ppb |
| 2021-02-10 | I2106441 | 2.90 ppb |
| 2021-02-22 | I2108110 | ND |
| 2021-02-23 | I2108305 | 2.10 ppb |
| 2021-02-23 | I2108307 | ND |
| 2021-02-25 | I2108881 | ND |
| 2021-02-25 | I2108882 | ND |
| 2021-02-25 | I2108883 | 2.00 ppb |
| 2021-03-10 | I2111204 | ND |
| 2021-03-10 | I2111201 | 2.40 ppb |
| 2021-03-31 | I2114461 | ND |
| 2021-03-31 | I2114464 | 3.90 ppb |
| 2021-04-14 | I2116875 | ND |
| 2021-04-14 | I2116880 | 2.60 ppb |
| 2021-04-21 | I2118267 | 2.60 ppb |
| 2021-04-21 | I2118266 | 3.70 ppb |
| 2021-06-02 | I2126624 | ND |
| 2021-06-04 | I2127176 | ND |
| 2021-06-09 | I2128359 | 4.60 ppb |
| 2021-06-14 | I2129194 | 3.00 ppb |
| 2021-06-16 | I2129746 | 3.20 ppb |
| 2021-06-24 | I2131599 | 3.20 ppb |
| 2021-07-06 | I2133416 | 4.30 ppb |
| 2021-07-06 | I2133418 | 15.0 ppb |
| 2021-07-06 | I2133431 | 10.00 ppb |
| 2021-07-06 | I2133413 | 3.00 ppb |
| 2021-07-07 | I2133971 | 2.10 ppb |
| 2021-07-19 | I2136258 | 2.80 ppb |
| 2021-07-27 | I2138169 | 3.00 ppb |
| 2021-08-03 | I2139583 | 3.60 ppb |
| 2021-08-03 | I2139591 | 4.10 ppb |
| 2021-09-01 | I2145794 | 10.00 ppb |
| 2021-10-12 | I2154636 | 2.50 ppb |
| 2021-10-27 | I2157910 | 4.70 ppb |
| 2021-10-27 | I2147909 | 5.70 ppb |
| 2022-02-08 | I2206351 | ND |
| 2022-02-28 | I2209478 | ND |
| 2022-05-04 | I2221318 | ND |
| 2022-05-11 | I2222577 | ND |
| 2022-05-11 | I2222573 | 2.50 ppb |
| 2022-06-08 | I2227283 | 2.80 ppb |
| 2022-06-28 | I2230856 | 6.40 ppb |
| 2022-06-28 | I2230843 | 2.10 ppb |
| 2022-06-28 | I2230854 | 2.70 ppb |
| 2022-07-12 | I2233126 | 4.30 ppb |
| 2022-07-12 | I2233125 | 15.0 ppb |
| 2022-07-12 | I2233124 | 3.10 ppb |
| 2022-07-12 | I2233123 | ND |
| 2022-07-19 | I2234591 | ND |
| 2022-07-26 | I2235903 | 3.90 ppb |
| 2022-08-03 | I2237790 | 3.70 ppb |
| 2022-10-04 | I2249484 | 3.80 ppb |
| 2022-10-04 | I2249481 | 3.80 ppb |
| 2022-10-12 | I2251168 | 2.70 ppb |
| 2022-11-07 | I2255275 | 3.30 ppb |
| 2023-01-24 | I2301536-01 | ND |
| 2023-03-08 | I2304392-01 | 4.20 ppb |
| 2023-03-08 | I2304392-02 | 6.80 ppb |
| 2023-03-08 | I2304392-03 | 5.70 ppb |
| 2023-03-08 | I2304392-04 | 3.50 ppb |
| 2023-03-08 | I2304392-05 | 2.10 ppb |
| 2023-03-08 | I2304392-07 | 3.10 ppb |
| 2023-03-08 | I2304392-08 | 2.60 ppb |
| 2023-03-09 | I2304517-01 | ND |
| 2023-03-09 | I2304517-02 | 2.70 ppb |
| 2023-03-09 | I2304517-03 | ND |
| 2023-03-09 | I2304517-05 | ND |
| 2023-03-09 | I2304517-07 | ND |
| 2023-03-09 | I2304517-08 | ND |
| 2023-03-09 | I2304517-09 | ND |
| 2023-04-26 | I2307945-01 | 3.40 ppb |
| 2023-04-26 | I2307945-03 | 4.10 ppb |
| 2023-04-26 | I2307945-05 | ND |
| 2023-04-26 | I2307945-07 | 5.80 ppb |
| 2023-04-26 | I2307950-03 | ND |
| 2023-04-26 | I2307950-05 | 4.70 ppb |
| 2023-04-26 | I2307950-06 | ND |
| 2023-04-26 | I2307950-07 | 3.70 ppb |
| 2023-04-27 | I2308073-01 | ND |
| 2023-04-27 | I2308073-02 | ND |
| 2023-04-27 | I2308073-03 | 3.90 ppb |
| 2023-04-27 | I2308073-05 | 3.10 ppb |
| 2023-04-27 | I2308073-06 | 2.40 ppb |
| 2023-04-27 | I2308073-09 | 5.60 ppb |
| 2023-05-03 | I2308473-01 | 7.20 ppb |
| 2023-05-03 | I2308473-02 | 2.80 ppb |
| 2023-05-03 | I2308473-03 | 5.70 ppb |
| 2023-06-07 | I2311313-01 | 2.20 ppb |
| 2023-06-07 | I2311303-01 | ND |
| 2023-06-07 | I2311289-01 | ND |
| 2023-06-07 | I2311276-01 | 2.20 ppb |
| 2023-06-07 | I2311269-01 | ND |
| 2023-06-07 | I2311310-01 | 2.80 ppb |
| 2023-06-07 | I2311268-01 | ND |
| 2023-06-07 | I2311287-01 | 2.30 ppb |
| 2023-06-07 | I2311299-01 | ND |
| 2023-06-07 | I2311291-01 | 2.10 ppb |
| 2023-06-07 | I2311322-01 | ND |
| 2023-06-09 | I2311494-01 | 6.20 ppb |
| 2023-06-09 | I2311493-01 | 2.70 ppb |
| 2023-06-09 | I2311483-01 | ND |
| 2023-06-09 | I2311482-01 | 4.20 ppb |
| 2023-06-09 | I2311481-01 | 3.50 ppb |
| 2023-06-09 | I2311487-01 | ND |
| 2023-06-09 | I2311479-01 | 4.60 ppb |
| 2023-06-09 | I2311498-01 | 2.90 ppb |
| 2023-06-09 | I2311484-01 | 2.90 ppb |
| 2023-06-14 | I2311843-01 | 2.70 ppb |
| 2023-06-14 | I2311835-01 | 8.60 ppb |
| 2023-06-14 | I2311829-01 | ND |
| 2023-06-27 | I2312920-01 | 4.60 ppb |
| 2023-06-27 | I2312921-01 | 2.90 ppb |
| 2023-07-06 | I2313595-01 | 5.30 ppb |
| 2023-07-06 | I2313603-01 | 2.70 ppb |
| 2023-07-13 | I2314344-01 | 5.60 ppb |
| 2023-07-13 | I2314342-01 | ND |
| 2023-07-13 | I2314346-01 | ND |
| 2023-07-13 | I2314341-01 | 4.10 ppb |
| 2023-07-13 | I2314335-01 | ND |
| 2023-07-14 | I2314537-01 | 3.70 ppb |
| 2023-07-19 | I2314930-01 | 16.2 ppb |
| 2023-07-26 | I2315515-01 | ND |
| 2023-07-26 | I2315513-01 | ND |
| 2023-07-26 | I2315525-01 | ND |
| 2023-07-26 | I2315535-01 | 3.60 ppb |
| 2023-07-26 | I2315536-01 | 3.60 ppb |
| 2023-07-31 | I2315916-01 | ND |
| 2023-07-31 | I2315912-01 | 2.50 ppb |
| 2023-07-31 | I2315873-01 | ND |
| 2023-07-31 | I2315880-01 | ND |
| 2023-07-31 | I2315890-01 | ND |
| 2023-07-31 | I2315875-01 | 2.30 ppb |
| 2023-10-04 | I2321589-01 | 3.10 ppb |
| 2023-10-04 | I2321592-01 | 3.20 ppb |
| 2023-10-04 | I2321614-01 | 2.90 ppb |
| 2023-11-01 | I2323665-01 | 3.40 ppb |
| 2023-11-01 | I2323671-01 | ND |
| 2023-11-01 | I2323669-01 | 3.20 ppb |