Know Your Environment. Protect Your Health.

Bromoform

City of Zavalla

Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

96

Samples

0

Samples exceeding legal limit (MCL)

54

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20185.91 ppb1612ND - 15.6 ppb
20193.71 ppb168ND - 15.4 ppb
20202.56 ppb163ND - 17.2 ppb
20214.96 ppb169ND - 28.4 ppb
20224.60 ppb1610ND - 12.3 ppb
20237.57 ppb1612ND - 25.6 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform is based on the California Office of Environmental Health Hazard Assessment's public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer, harm to reproduction and child development, and change to fetal growth and development .

ppb = parts per billion

All test results

Date Lab ID Result
2018-02-12Q1805619003ND
2018-02-12Q18056190191.02 ppb
2018-02-12Q18056190202.98 ppb
2018-02-12Q18056190025.01 ppb
2018-05-17Q18202100028.78 ppb
2018-05-17Q1820210003ND
2018-05-17Q18202100055.55 ppb
2018-05-17Q18202100068.95 ppb
2018-08-15Q18329650019.75 ppb
2018-08-15Q1832965003ND
2018-08-15Q183296500415.6 ppb
2018-08-15Q18329650063.61 ppb
2018-12-03Q184901800113.5 ppb
2018-12-03Q184901800413.9 ppb
2018-12-03Q18490180025.97 ppb
2018-12-11Q1850895002ND
2019-02-11Q190601800111.5 ppb
2019-02-11Q1906018003ND
2019-02-11Q19060180151.52 ppb
2019-02-11Q19060180162.25 ppb
2019-04-29Q19172480013.28 ppb
2019-04-29Q19172480029.26 ppb
2019-04-29Q19172480041.71 ppb
2019-04-29Q1917248005ND
2019-08-21Q1957739003ND
2019-08-21Q1957739006ND
2019-08-21Q1957739005ND
2019-08-21Q195773900114.4 ppb
2019-11-05Q1975066003ND
2019-11-05Q1975066005ND
2019-11-05Q1975066006ND
2019-11-05Q197506600115.4 ppb
2020-01-22Q2002509006ND
2020-01-22Q2002509011ND
2020-01-22Q2002509012ND
2020-03-09Q2008888003ND
2020-04-08Q2014238005ND
2020-04-08Q2014238006ND
2020-04-08Q2014238003ND
2020-04-08Q201423800117.2 ppb
2020-07-14Q202769100113.1 ppb
2020-07-14Q2027691003ND
2020-07-14Q2027691005ND
2020-07-14Q2027691006ND
2020-10-07Q203930200110.6 ppb
2020-10-07Q2039302003ND
2020-10-07Q2039302005ND
2020-10-07Q2039302006ND
2021-01-12Q2100808018ND
2021-01-12Q210080800413.6 ppb
2021-01-12Q2100808006ND
2021-01-12Q21008080171.23 ppb
2021-04-08Q210900000528.4 ppb
2021-04-08Q21090000073.01 ppb
2021-04-08Q21090000082.20 ppb
2021-04-08Q2109000003ND
2021-07-28Q211970600114.9 ppb
2021-07-28Q2119706003ND
2021-07-28Q21197060052.39 ppb
2021-07-28Q2119706006ND
2021-10-05Q2127299006ND
2021-10-05Q21272990051.46 ppb
2021-10-05Q2127299003ND
2021-10-05Q212729900112.1 ppb
2022-01-05Q2200291011ND
2022-01-05Q2200291012ND
2022-01-05Q2200291013ND
2022-01-05Q220029101510.7 ppb
2022-04-05Q22104260015.53 ppb
2022-04-05Q22104260032.09 ppb
2022-04-05Q22104260058.61 ppb
2022-04-05Q22104260067.46 ppb
2022-07-08Q2219195007ND
2022-07-08Q2219195004ND
2022-07-08Q22191950028.10 ppb
2022-07-08Q2219195006ND
2022-10-04Q22297470016.07 ppb
2022-10-04Q22297470031.01 ppb
2022-10-04Q222974700512.3 ppb
2022-10-04Q222974700611.7 ppb
2023-01-09Q23008030041.58 ppb
2023-01-09Q2300803006ND
2023-01-09Q230080301213.5 ppb
2023-01-09Q230080301313.4 ppb
2023-05-15Q23182630021.76 ppb
2023-05-15Q231826300524.4 ppb
2023-05-15Q2318263003ND
2023-05-15Q23182630015.36 ppb
2023-08-07Q23321440018.50 ppb
2023-08-07Q23321440021.32 ppb
2023-08-07Q233214400325.6 ppb
2023-08-07Q2332144005ND
2023-10-10Q234313400123.3 ppb
2023-10-10Q2343134003ND
2023-10-10Q23431340051.18 ppb
2023-10-10Q23431340061.16 ppb