National Drinking Water Database
Chlorite in California
Chlorite is a disinfection byproduct resulting from water treatment with chlorine dioxide, or from the use of chlorine dioxide as a bleaching agent for cellulose, paper pulp, flour and oils. [read more]
The Most Polluted Communities in California
7 water utilities reported detecting Chlorite in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies
Ranked by highest average Chlorite level
| Rank | System | Population Served | Positive test results of total reported tests | Average Level (Range) |
|---|---|---|---|---|
| 1 | City of Escondido Escondido, CA | 140,000 | 1 of 1 | 550 ppb (550 ppb) |
| 2 | Santa FE I.D. Rancho Santa Fe, CA | 20,828 | 16 of 17 | 482.82 ppb (0 to 698 ppb) |
| 3 | Carlsbad Mwd Carlsbad, CA | 53,550 | 1,072 of 1,084 | 462.56 ppb (0 to 890 ppb) |
| 4 | City of Daly City Daly City, CA | 92,311 | 14 of 14 | 362.86 ppb (340 to 370 ppb) |
| 5 | Hillview Wc-Oakhurst/Sierra Lakes Oakhurst, CA | 2,961 | 1 of 1 | 37 ppb (37 ppb) |
| 6 | Sa#14 Chuk Chanse Subdivision Madera, CA | 100 | 1 of 1 | 32 ppb (32 ppb) |
| 7 | Contra Costa Water District Concord, CA | 200,000 | 1 of 9 | 9.44 ppb (0 to 85 ppb) |
Health Based Limits for Chlorite
| Standard | Description | Level |
|---|---|---|
| Maximum Contaminant Limit Goal (MCLG) | A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency. | 800 ppb |
| Lifetime health-based limit, non-cancer risk | Concentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for a lifetime of exposure. The Lifetime health-based limit (or Health Advisory, HA) is based on exposure for a a 70-kg adult consuming 2 liters of water per day. Source: U.S. Environmental Protection Agency. | 800 ppb |
| Children's health-based limit for 1-day exposure | Concentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for up to one day of exposure. The One-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency. | 840 ppb |
| Children's health-based limit for 10-day exposure | Concentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic effects for up to ten days of exposure. The Ten-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency. | 840 ppb |
| Maximum Contaminant Limit (MCL) | The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency. | 1000 ppb |
| Drinking Water Equivalent Level | A lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency. | 1000 ppb |
Violation Summary for Chlorite in California
There are no violations reported for this contaminant in California