This pages shows a summary of water test results completed for the Flint Secondary Water Source Project. Water samples were collected throughout the community from multiple sampling events. Sampling events are the times when the water sampling teams comes to collect water samples.
Select the sampling event you are interested in reviewing. Each sampling event will show a summary table with the most recent test results data that has been processed. As new results are processed, a new sampling event table will be added with those results. These results do not provide, and are not meant to be, a complete summary of the findings. MDHHS will develop two reports summarizing the results. The first report will summarize the first 13 sampling events. The second report will summarize the five sampling events from follow-up sampling. Both reports will be posted online.
The "Learn more here" link in the summary table will direct viewers to the "Important Information on the Water Quality Parameters Measured in Your Water" fact sheet. There you can learn more about each parameter that was tested. Parameters are the metals, chemicals, or other water characteristics measured in your water.
Section 1: Metals
| Parameter | Number of locations sampled (number of initial samples/numbers of flushed samples) | Median Initial Samples (mg/L) | Lowest Initial Samples (mg/L) | Highest Initial Samples (mg/L) | Median Flushed Samples (mg/L) | Lowest Flushed Samples (mg/L) | Highest Flushed Samples (mg/L) | US Environmental Protection Agency (US EPA) Drinking Water Value (mg/L) | Health-based Level (mg/L) |
| Aluminum | 46 ( 46 / 46) | ND | ND | 0.16 | ND | ND | ND | 0.05-0.20 (J) | 0.3 (D) |
| Antimony | 46 ( 46 / 46 ) | ND | ND | ND | ND | ND | ND | 0.006 (F) | 0.0028 (B: chronic for children) |
| Arsenic | 46 ( 46 / 46 ) | ND | ND | ND | ND | ND | ND | 0.01(F) | 0 (G) |
| Barium | 46 ( 46 / 46 ) | 0.013 | ND | 0.016 | 0.013 | ND | 0.014 | 2 (F) | 0.7 (E: 1/10- day for children) |
| Beryllium | 46 ( 46 / 46 ) | ND | ND | ND | ND | ND | ND | 0.004 (F) | 0.004 (G) |
| Boron | 46 ( 46 / 46 ) | ND | ND | ND | ND | ND | ND | Value not established | 1.4 (C: chronic for children) |
| Cadmium | 46 ( 46 / 46 ) | ND | ND | ND | ND | ND | ND | 0.005 (F) | 0.0007 (C: chronic for children) |
| Chromium, total | 46 ( 46 / 46 ) | ND | ND | ND | ND | ND | ND | 0.1 (F) | 0.0063 (C: chronic for children, Cr (VI))1 |
| Copper | 46 ( 46 / 46 ) | ND | ND | 0.18 | ND | ND | ND |
1.3 (A) |
0.07 (C: acute/ intermediate for children) 1.3 (G)2 |
| Iron | 46 ( 46 / 46 ) | ND | ND | 1.2 | ND | ND | ND | 0.30 (J) | 2 (D) |
| Lead | 46 ( 46 / 46 ) | ND | ND | ND | ND | ND | ND | 0.015 (A) | 0 (G) |
| Manganese | 46 ( 46 / 46 ) | ND | ND | ND | ND | ND | ND | 0.05 (J) | 0.3 (E: lifetime) |
| Molybdenum | 46 ( 46 / 46 ) | ND | ND | ND | ND | ND | ND | Value not established | 0.035 (B: chronic for children) |
| Nickel | 46 ( 46 / 46 ) | ND | ND | ND | ND | ND | ND | Value not established | 0.1 (E: lifetime) |
| Selenium | 46 ( 46 / 46 ) | ND | ND | ND | ND | ND | ND | 0.05 (F) | 0.035 (B, C: chronic for children) |
| Silver | 46 ( 46 / 46 ) | ND | ND | ND | ND | ND | ND | 0.1 (J) | 0.035 (C: children - chronic for children) |
| Thallium | 46 ( 46 / 46 ) | ND | ND | ND | ND | ND | ND | 0.002 (F) | 0.0002 (I) |
| Tin | 46 ( 46 / 46 ) | ND | ND | ND | ND | ND | ND | Value not established | 2.1 (C: intermediate children) |
| Vanadium | 46 ( 46 / 46) | ND | ND | ND | ND | ND | ND | Value not established | 0.0045 (D) |
| Zinc | 46 ( 46 / 46 ) | ND | ND | 0.26 | ND | ND | 0.047 | 5 (J) | 2 (E: lifetime) |
Section 2: Disinfectants, Disinfection Byproducts, and Bacteria
| Parameter | Number of locations sampled (number of initial samples/numbers of flushed samples) | Median Initial Samples (mg/L) | Lowest Initial Samples (mg/L) | Highest Initial Samples (mg/L) | Median Flushed Samples (mg/L) | Lowest Flushed Samples (mg/L) | Highest Flushed Samples (mg/L) | US Environmental Protection Agency (US EPA) Drinking Water Value (mg/L) | Health-based Level (mg/L) |
| Chlorine (as Il2, mg/L) | 46 ( 43 / 47 ) | 1.20 | 0.03 | 2.26 | 1.56 | 0.02 | 2.78 | 4 (H) | Learn more here |
| Haloacetic Acids (HAA5, µg/L) | 46 ( 47 / 46 ) | 14.01 | ND | 31.5 | 13.33 | ND | 23.8 | 60 (F) | Learn more here |
| Total Trihalomethanes (TTHMs, µg/L) | 46 ( 46 / 46 ) | 23 | 12 | 88 | 19 | 14 | 37 | 80 (F) | Learn more here |
Section 3: General Chemistry
| Parameter | Number of locations sampled (number of initial samples/numbers of flushed samples) | Median Initial Samples (mg/L) | Lowest Initial Samples (mg/L) | Highest Initial Samples (mg/L) | Median Flushed Samples (mg/L) | Lowest Flushed Samples (mg/L) | Highest Flushed Samples (mg/L) | US Environmental Protection Agency (US EPA) Drinking Water Value (mg/L) | Health-based Level (mg/L) |
| Calcium (mg/L) | 46 ( 46 / 46 ) | 26 | ND | 27 | 26 | ND | 28 | Learn more here | Learn more here |
| Chloride (mg/L) | 46 ( 46 / 46 ) | 9.9 | 9.3 | 11 | 9.8 | 9.2 | 11 | 250 (F) | Learn more here |
| Specific Conductance (µmhos/cm) | 46 ( 46 / 46 ) | 230 | 220 | 240 | 230 | 220 | 240 | Learn more here | Learn more here |
| Hardness (as mg/L of CaCO3) | 46 ( 46 / 46 ) | 96 | ND | 100 | 96 | ND | 100 | Learn more here | Learn more here |
| Magnesium (mg/L) | 46 ( 46 / 46 ) | 7.5 | ND | 8.4 | 7.5 | ND | 7.6 | Learn more here | 400 (D) |
| Orthophosphate (mg/L) | 46 ( 46 / 46 ) | 1.1 | 0.65 | 12 | 1.2 | 1.1 | 1.2 | Learn more here | Learn more here |
| pH (SU) | 46 ( 43 / 47 ) | 7.53 | 6.94 | 8.58 | 7.53 | 6.97 | 8.13 | 6.5 - 8.5 (F) | Learn more here |
| Sodium (mg/L) | 46 ( 46 / 46 ) | 6.7 | 5.8 | 45 | 6.7 | 5.5 | 45 | Learn more here | Learn more here |
| Sulfate (mg/L) | 46 ( 46 / 46 ) | 19 | 18 | 21 | 19 | 18 | 21 | 250 (F) | 500 (E) |
| Total Alkalinity (mg/L) | 46 ( 46 / 46 ) | 73 | 70 | 92 | 73 | 69 | 92 | Learn more here | Learn more here |
| Turbidity (NTU) | 46 ( 46 / 46 ) | ND | ND | 2.7 | ND | ND | ND | Learn more here | Learn more here |
