National Drinking Water Database
Chloroform in Michigan
Chloroform is a disinfection byproduct from the trihalomethane (THM) family, and is formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water. [read more]
The Most Polluted Communities in Michigan
466 water utilities reported detecting Chloroform in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies
Ranked by highest average Chloroform level
| Rank | System | Population Served | Positive test results of total reported tests | Average Level (Range) |
|---|---|---|---|---|
| 1 | Nahma Township Rapid River, MI | 95 | 1 of 1 | 80 ppb (80 ppb) |
| 2 | City of Rogers City Rogers City, MI | 3,322 | 2 of 2 | 56.75 ppb (43 to 70.5 ppb) |
| 3 | Deerfield Deerfield, MI | 1,006 | 5 of 6 | 51.26 ppb (0 to 76 ppb) |
| 4 | Bad Axe Bad Axe, MI | 3,574 | 4 of 4 | 47.5 ppb (38.5 to 69 ppb) |
| 5 | Haring Charter Twp. Cadillac, MI | 839 | 3 of 3 | 47 ppb (44 to 49 ppb) |
| 6 | South Haven South Haven, MI | 5,021 | 6 of 6 | 46.61 ppb (32 to 62 ppb) |
| 7 | Adrian Adrian, MI | 22,275 | 4 of 4 | 46.46 ppb (21.6 to 80.75 ppb) |
| 8 | Negaunee-Ishpeming Authority Negaunee, MI | 1 | 4 of 5 | 43.8 ppb (0 to 86 ppb) |
| 9 | Manistique Manistique, MI | 3,874 | 5 of 5 | 43.1 ppb (19.75 to 65.5 ppb) |
| 10 | Hillsdale Hillsdale, MI | 9,000 | 1 of 1 | 42 ppb (42 ppb) |
Health Based Limits for Chloroform
| Standard | Description | Level |
|---|---|---|
| EPA Human Health Water Quality Criteria | Water quality criteria set by the US EPA provide guidance for states and tribes authorized to establish water quality standards under the Clean Water Act (CWA) to protect human health. These are non-enforceable standards based upon exposure by both drinking water and the contribution of water contamination to other consumed foods. Source: U.S. Environmental Protection Agency. | 5.7 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. | 35 ppb |
| 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. | 70 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. | 70 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. | 80 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. | 4000 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. | 4000 ppb |
Violation Summary for Chloroform in Michigan
Data from the U.S. Environmental Protection Agency includes the following violations of federal standards in Michigan since 2004
| Violation Type | Number of Violations |
|---|---|
| Failure to monitor regularly | 1 |