Skip to main content

Flint Secondary Water Source Project Community Data Summary

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.

MDHHS Follow-up Sampling Event 3 (11/02/2022-11/04/2022)

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 50 ( 50 / 50) 0.0715 ND 0.35 0.0715 ND 0.48 0.05-0.20 (J) 0.3 (D)
Antimony 50 ( 50 / 50 ) ND ND ND ND ND ND 0.006 (F) 0.0028 (B: chronic for children)
Arsenic 50 ( 50 / 50 ) ND ND ND ND ND ND 0.01(F) 0 (G)
Barium 50 ( 50 / 50 ) 0.013 ND 0.015 0.013 ND 0.016 2 (F) 0.7 (E: 1/10- day for children)
Beryllium 50 ( 50 / 50 ) ND ND ND ND ND ND 0.004 (F) 0.004 (G)
Boron 50 ( 50 / 50 ) ND ND ND ND ND ND Value not established 1.4 (C: chronic for children)
Cadmium 50 ( 50 / 50 ) ND ND ND ND ND ND 0.005 (F) 0.0007 (C: chronic for children)
Chromium, total 50 ( 50 / 50 ) ND ND ND ND ND ND 0.1 (F) 0.0063 (C: chronic for children, Cr (VI))1
Copper 50 ( 50 / 50 ) ND ND 0.23 ND ND 0.052

1.3 (A)
1.0 (J)

0.07 (C: acute/ intermediate for children) 1.3 (G)2
Iron 50 ( 50 / 50 ) ND ND ND ND ND 0.12 0.30 (J) 2 (D)
Lead 50 ( 50 / 50 ) ND ND 0.0024 ND ND ND 0.015 (A) 0 (G)
Manganese 50 ( 50 / 50 ) ND ND ND ND ND ND 0.05 (J) 0.3 (E: lifetime)
Molybdenum 50 ( 50 / 50 ) ND ND ND ND ND ND Value not established 0.035 (B: chronic for children)
Nickel 50 ( 50 / 50 ) ND ND ND ND ND ND Value not established 0.1 (E: lifetime)
Selenium 50 ( 50 / 50 ) ND ND ND ND ND ND 0.05 (F) 0.035 (B, C: chronic for children)
Silver 50 ( 50 / 50 ) ND ND ND ND ND ND 0.1 (J) 0.035 (C: children - chronic for children)
Thallium 50 ( 50 / 50 ) ND ND ND ND ND ND 0.002 (F) 0.0002 (I)
Tin 50 ( 50 / 50 ) ND ND ND ND ND ND Value not established 2.1 (C: intermediate children)
Vanadium 50 ( 50 / 50 ) ND ND ND ND ND ND Value not established 0.0045 (D)
Zinc 50 ( 50 / 50 ) ND ND 0.19 ND ND 0.072 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) 50 ( 50 / 50 ) 0.88 ND 1.71 1.32 0.06 1.89 4 (H) Learn more here
Haloacetic Acids (HAA5, µg/L) 50 ( 50 / 50 ) 21.1 ND 36.1 21.1 ND 34.5 60 (F) Learn more here
Total Trihalomethanes (TTHMs, µg/L) 50 ( 50 / 50 ) 33 23 92 33 23 78 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) 50 ( 50 / 50 ) 27 ND 28 27 ND 28 Learn more here Learn more here
Chloride (mg/L) 50 ( 50 / 50 ) 11 9.7 12 11 9.6 12 250 (F) Learn more here
Specific Conductance (µmhos/cm) 50 ( 50 / 50 ) 240 230 250 240 230 250 Learn more here Learn more here
Hardness (as mg/L of CaCO3) 50 ( 50 / 50 ) 99 ND 100 99 ND 100 Learn more here Learn more here
Magnesium (mg/L) 50 ( 50 / 50 ) 7.8 ND 8.2 7.8 ND 8.2 Learn more here 400 (D)
Orthophosphate (mg/L) 50 ( 50 / 50 ) 0.955 0.032 1.2 0.955 0.038 1.1 Learn more here Learn more here
pH (SU) 50 ( 50 / 50 ) 7.58 7.02 8.78 7.75 6.97 8.71 6.5 - 8.5 (F) Learn more here
Sodium (mg/L) 50 ( 50 / 50 ) 7.9 7 54 7.9 6.8 55 Learn more here Learn more here
Sulfate (mg/L) 50 ( 50 / 50 ) 18 17 20 18 16 20 250 (F) 500 (mg/L) (E)
Total Alkalinity (mg/L) 50 ( 50 / 50 ) 77 74 79 77 74 78 Learn more here Learn more here
Turbidity (NTU) 50 ( 50 / 50 ) ND ND 1.45 ND ND 1.57 Learn more here Learn more here

Select from the options below to learn about the community's data summary results.