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All water quality parameters sample results

All water quality parameters sample results

This page shows test results for all water quality parameters measured during the Flint Secondary Water Source Project. Parameters are the metals, chemicals, or other measured water characteristics in your water.

Each grouping of water quality parameters is separated out into tables to provide a data summary of each sampling event. The tables are grouped by:

  1. Metals
  2. Disinfectants / disinfection byproducts, and bacteria
  3. General water chemistry

Tables show combined data for each parameter from completed sampling events.

Section 1: Metal Sampling Results

Certain conditions can cause metals from your home's plumbing to release into your drinking water. Some metals may also come from the source water. Too much metal in drinking water can be a health concern.

Metals can be found dissolved in water and in small pieces called particulates. MDHHS tested water samples for the total amount of each metal, dissolved and particulates. MDHHS also tested water samples for dissolved lead, copper, iron, and manganese. These results were used to calculate the amount of metal particulate in the water.

  • Aluminum

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 ND ND 0.17 ND ND 0.22 0.05-0.20 (J) 0.8 (D)
    08/02/22-08/04/22 49 49 49 0.0705 ND 0.43 0.0705 ND 0.38 0.05-0.20 (J) 0.3 (D)
    11/02/22-11/04/22 50 50 50 0.0715 ND 0.35 0.0715 ND 0.48 0.05-0.20 (J) 0.3 (D)
    02/07/23- 02/09/23 51 51 51 ND ND 0.17 ND ND 0.3 0.05-0.20 (J) 0.3 (D)

    Aluminum - Water Quality Parameter Results (pdf)

  • Antimony

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 ND ND ND ND ND ND 0.006 (F) 0.0028 (B: chronic for children)
    08/02/22-08/04/22 49 49 49 ND ND ND ND ND ND 0.006 (F) 0.0028 (B: chronic for children)
    11/02/22-11/04/22 50 50 50 ND ND ND ND ND ND 0.006 (F) 0.0028 (B: chronic for children)
    02/07/23-02/09/23 51 51 51 ND ND ND ND ND ND 0.006 (F) 0.0028 (B: chronic for children)

    Antimony - Water Quality Parameter Results (pdf)

  • Arsenic

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 ND ND ND ND ND ND 0.01 (F) 0 (G)
    08/02/22-08/04/22 49 49 49 ND ND ND ND ND ND 0.01 (F) 0 (G)
    11/02/22-11/04/22 50 50 50 ND ND ND ND ND ND 0.01 (F) 0 (G)
    02/07/23-02/09/23 51 51 51 ND ND ND ND ND ND 0.01 (F) 0 (G)

    Arsenic - Water Quality Parameter Results (pdf)

  • Barium

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 0.013 ND 0.021 0.013 ND 0.014 2 (F) 0.7 (E: 1/10- day for children)
    08/02/22-08/04/22 49 49 49 0.014 ND 0.016 0.014 ND 0.016 2 (F) 0.7 (E: 1/10- day for children)
    11/02/22-11/04/22 50 50 50 0.013 ND 0.015 0.013 ND 0.016 2 (F) 0.7 (E: 1/10- day for children)
    02/07/23-02/09/23 51 51 51 0.012 ND 0.014 0.012 ND 0.014 2 (F) 0.7 (E: 1/10- day for children)

    Barium - Water Quality Parameter Results (pdf)

  • Beryllium

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 ND ND ND ND ND ND 0.004 (F) 0.004 (G)
    08/02/22-08/04/22 49 49 49 ND ND ND ND ND ND 0.004 (F) 0.004 (G)
    11/02/22-11/04/22 50 50 50 ND ND ND ND ND ND 0.004 (F) 0.004 (G)
    02/07/23-02/09/23 51 51 51 ND ND ND ND ND ND 0.004 (F) 0.004 (G)

    Beryllium - Water Quality Parameter Results (pdf)

  • Boron

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 ND ND 0.061 ND ND ND Value not established 1.4 (C: chronic for children)
    08/02/22-08/04/22 49 49 49 ND ND 0.093 ND ND ND Value not established 1.4 (C: chronic for children)
    11/02/22-11/04/22 50 50 50 ND ND ND ND ND ND Value not established 1.4 (C: chronic for children)
    02/07/23-02/09/23 51 51 51 ND ND ND ND ND ND Value not established 1.4 (C: chronic for children)

    Boron - Water Quality Parameter Results (pdf)

  • Cadmium

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 ND ND 0.0025 ND ND ND 0.005 (F) 0.0007 (C: chronic for children)
    08/02/22-08/04/22 49 49 49 ND ND ND ND ND ND 0.005 (F) 0.0007 (C: chronic for children)
    11/02/22-11/04/22 50 50 50 ND ND ND ND ND ND 0.005 (F) 0.0007 (C: chronic for children)
    02/07/23-02/09/23 51 51 51 ND ND ND ND ND ND 0.005 (F) 0.0007 (C: chronic for children)

    Cadmium - Water Quality Parameter Results (pdf)

  • Chromium total

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 ND ND ND ND ND ND 0.1 (F) 0.0063 (C: chronic for children, Cr (VI))1
    08/02/22-08/04/22 49 49 49 ND ND ND ND ND ND 0.1 (F) 0.0063 (C: chronic for children, Cr (VI))1
    11/02/22-11/04/22 50 50 50 ND ND ND ND ND ND 0.1 (F) 0.0063 (C: chronic for children, Cr (VI))1
    02/07/23-02/09/23 51 51 51 ND ND ND ND ND ND 0.1 (F) 0.0063 (C: chronic for children, Cr (VI))1

    Chromium Total - Water Quality Parameter Results (pdf)

  • Copper

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 ND ND 0.11 ND ND ND 1.3 (A)
    1.0 (J)    		 0.07 (C: acute/ intermediate for children) 1.3 (G)2
    08/02/22-08/04/22 49 49 49 ND ND 0.081 ND ND 0.032 1.3 (A)
    1.0 (J)    		 0.07 (C: acute/ intermediate for children) 1.3 (G)2
    11/02/22-11/04/22 50 ( 50 / 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
    02/07/23-02/09/23 51 51 51 ND ND 0.074 ND ND ND 1.3 (A)
    1.0 (J)    		 0.07 (C: acute/ intermediate for children) 1.3 (G)2

    Copper - Water Quality Parameter Results (pdf)

  • Iron

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 ND ND ND ND ND ND 0.30 (J) 2 (D)
    08/02/22-08/04/22 49 49 49 ND ND ND ND ND ND 0.30 (J) 2 (D)
    11/02/22-11/04/22 50 50 50 ND ND ND ND ND .12 0.30 (j) 2 (D)
    02/07/23-02/09/23 51 51 51 ND ND 0.12 ND ND ND 0.30 (j) 2 (D)

    Iron - Water Quality Parameter Results (pdf)

  • Lead

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 ( 55 / 55 ) 55 55 ND ND ND ND ND ND 0.015 (A) 0 (G)
    08/02/22-08/04/22 49 ( 49 / 49 ) 49 49 ND ND 0.0013 ND ND 0.0011 0.015 (A) 0 (G)
    11/02/22-11/04/22 50 ( 50 / 50 ) 50 50 ND ND 0.0024 ND ND ND 0.015 (A) 0 (G)
    02/07/23-02/09/23 51 51 51 ND ND ND ND ND ND 0.015 (A) 0 (G)

    Lead - Water Quality Parameter Results (pdf)

  • Manganese

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 ND ND ND ND ND ND 0.05 (J) 0.03 (E: lifetime)
    08/02/22-08/04/22 49 49 49 ND ND ND ND ND ND 0.05 (J) 0.03 (E: lifetime)
    11/02/22-11/04/22 50 50 50 ND ND ND ND ND ND 0.05 (J) 0.03 (E: lifetime)
    02/07/23-02/09/23 51 51 51 ND ND ND ND ND ND 0.05 (J) 0.03 (E: lifetime)

    Manganese - Water Quality Parameter Results (pdf)

  • Molybdenum

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 ND ND ND ND ND ND Value not established 0.035 (B: chronic for children)
    08/02/22-08/04/22 49 49 49 ND ND ND ND ND ND Value not established 0.035 (B: chronic for children)
    11/02/22-11/04/22 50 50 50 ND ND ND ND ND ND Value not established 0.035 (B: chronic for children)
    02/07/23-02/09/23 51 51 51 ND ND ND ND ND ND Value not established 0.035 (B: chronic for children)

    Molybdenum - Water Quality Parameter Results (pdf)

  • Nickel

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 ND ND ND ND ND ND Value not established 0.1 (E: lifetime)
    08/02/22-08/04/22 49 49 49 ND ND ND ND ND ND Value not established 0.1 (E: lifetime)
    11/02/22-11/04/22 50 50 50 ND ND ND ND ND ND Value not established 0.1 (E: lifetime)
    02/07/23-02/09/23 51 51 51 ND ND ND ND ND ND Value not established 0.1 (E: lifetime)

    Nickel - Water Quality Parameter Results (pdf)

  • Selenium

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 ND ND ND ND ND ND 0.05 (F) 0.035 (B, C: chronic for children)
    08/02/22-08/04/22 49 49 49 ND ND ND ND ND ND 0.05 (F) 0.035 (B, C: chronic for children)
    11/02/22-11/04/22 50 50 50 ND ND ND ND ND ND 0.05 (F) 0.035 (B, C: chronic for children)
    02/07/23-02/09/23 51 51 51 ND ND ND ND ND ND 0.05 (F) 0.035 (B, C: chronic for children)

    Selenium - Water Quality Parameter Results (pdf)

  • Silver

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 ND ND ND ND ND ND 0.1 (J) 0.035 (B, C: chronic for children)
    08/02/22-08/04/22 49 49 49 ND ND ND ND ND ND 0.1 (J) 0.035 (B, C: chronic for children)
    11/02/22-11/04/22 50 50 50 ND ND ND ND ND ND 0.1 (J) 0.035 (B, C: chronic for children)
    02/07/23-02/09/23 51 51 51 ND ND 0.00057 ND ND 0.0054 0.1 (J) 0.035 (B, C: chronic for children)

    Silver - Water Quality Parameter Results (pdf)

  • Thallium

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 ND ND ND ND ND ND 0.002 (F) 0.0002 (I)
    08/02/22-08/04/22 49 49 49 ND ND ND ND ND ND 0.002 (F) 0.0002 (I)
    11/02/22-11/04/22 50 50 50 ND ND ND ND ND ND 0.002 (f) 0.0002 (i)
    02/07/23-02/09/23 51 51 51 ND ND ND ND ND ND 0.002 (f) 0.0002 (I)

    Thallium - Water Quality Parameter Results (pdf)

  • Tin

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 ND ND ND ND ND ND Value not established 2.1 (C: intermediate children)
    08/02/22-08/04/22 49 49 49 ND ND ND ND ND ND Value not established 2.1 (C: intermediate children)
    11/02/22-11/04/22 50 50 50 ND ND ND ND ND ND Value not established 2.1 (C: intermediate children)
    02/07/23-02/09/23 51 51 51 ND ND ND ND ND ND Value not established 2.1 (C: intermediate children)

    Tin - Water Quality Parameter Results (pdf)

  • Vanadium

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 ND ND ND ND ND ND Value not established 0.0045 (D)
    08/02/22-08/04/22 49 49 49 ND ND ND ND ND ND Value not established 0.0045 (D)
    11/02/22-11/04/22 50 50 50 ND ND ND ND ND ND Value not established 0.0045 (D)
    02/07/23-02/09/23 51 51 51 ND ND ND ND ND ND Value not established 0.0045 (D)

    Vanadium - Water Quality Parameter Results (pdf)

  • Zinc

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 ND ND 0.39 ND ND 0.047 5 (j) 2 (E: lifetime)
    08/02/22-08/04/22 49 49 49 ND ND 0.51 ND ND 0.04 5 (J) 2: (E: lifetime)
    11/02/22-11/04/22 50 50 50 ND ND 0.19 ND ND 0.072 5 (J) 2: (E: lifetime)
    02/07/23-02/09/23 51 51 51 ND ND 0.61 ND ND 0.073 5 (J) 2: (E: lifetime)

    Zinc - Water Quality Parameter Results (pdf)

Section 2: Disinfectant, Disinfection Byproducts, and Bacteria Sampling Results

Community public water supplies add chemicals like chlorine3 to help improve the quality of water delivered to homes. These chemicals may also generate disinfection byproducts (DBPs)4 during the disinfection process.

Chlorine is an effective way to remove bacteria from the water. But swallowing water with too much chlorine or DBPs or inhale too much while showering over time can be a health concern.

The water may have also be tested for coliform bacteria if the chlorine level was low. MDHHS and the City of Flint followed up with residents if any bacteria were found in their results.

  • Chlorine (as Cl2)

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 54 54 53 1.015 0 1.76 1.46 0.04 1.87 4 (H) Learn more here
    08/02/22-08/04/22 48 45 48 0.77 0.04 1.56 1.245 0.07 1.74 4 (H) Learn more here
    11/02/22-11/04/22 50 50 50 0.88 ND 1.71 1.32 0.06 1.89 4 (H) Learn more here
    02/07/23-02/09/23 51 46 51 1.28 0 1.93 1.64 0 3.85 4 (H) Learn more here

    Chlorine - Water Quality Parameter Results (pdf)

  • Haloacetic Acids (HAA5)

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 54 14 ND 25.8 14 ND 25.5 60 (F) Learn more here
    08/02/22-08/04/22 49 49 49 25.5 ND 44.3 25.5 12.3 38 60 (F) Learn more here
    11/02/22-11/04/22 50 50 50 21.1 ND 36.1 21.1 ND 34.5 60 (F) Learn more here
    02/07/23-02/09/23 51 51 51 13.8 ND 52.7 13.2 ND 18.2 60 (F) Learn more here

    Haloacetic Acids - Water Quality Parameter Results (pdf)

  • Total Trihalomethanes (TTHMs)

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 25 20 86 25 18 67 80 (F) Learn more here
    08/02/22-08/04/22 49 49 49 42 35 120 42 35 63 80 (F) Learn more here
    11/02/22-11/04/22 50 50 50 33 23 92 33 23 78 80 (F) Learn more here
    02/07/23-02/09/23 51 51 51 21 15 87 17 14 36 80 (F) Learn more here

    Total Trihalomethanes - Water Quality Parameter Results (pdf)

Section 3: General Chemistry Sampling Results

General chemistry is a group of water quality parameters that measure how corrosive the water is. Testing the water for these parameters will provide an understanding of how well the corrosion control works in households. Many of the parameters in this group are not chemicals and do not cause health problems directly by themselves. The City of Flint measures the water quality parameters in water samples collected from the blending site and other pipes that carries drinking water from the plant to homes.

  • Calcium

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 28 ND 31 28 ND 31 Learn more here Learn more here
    08/02/22-08/04/22 49 49 49 28 ND 31 28 ND 31 Learn more here Learn more here
    11/02/22-11/04/22 50 50 50 27 ND 28 27 ND 28 Learn more here Learn more here
    02/07/23-02/09/23 51 51 51 27 ND 29 27 ND 29 Learn more here Learn more here

  • Chloride

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 54 10 9.6 11 10 9.5 11 250 (F) Learn more here
    08/02/22-08/04/22 49 49 49 11 9.9 13 11 10 11 250 (F) Learn more here
    11/02/22-11/04/22 50 50 50 11 9.7 12 11 9.6 12 250 (F) Learn more here
    02/07/23-02/09/23 51 51 51 9.9 9.2 11 9.8 9 11 250 (F) Learn more here

  • Specific Conductance

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 54 250 240 260 250 240 260 Learn more here Learn more here
    08/02/22-08/04/22 49 49 49 240 230 310 240 240 250 Learn more here Learn more here
    11/02/22-11/04/22 50 50 50 240 230 250 240 230 250 Learn more here Learn more here
    02/07/23-02/09/23 51 51 51 240 230 240 240 230 240 Learn more here Learn more here

    Specific Conductance - Water Quality Parameter Results (pdf)

  • Hardness

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 100 ND 110 100 ND 110 Learn more here Learn more here
    08/02/22-08/04/22 49 49 49 100 ND 110 100 ND 110 Learn more here Learn more here
    11/02/22-11/04/22 50 50 50 99 ND 100 99 ND 100 Learn more here Learn more here
    02/07/23-02/09/23 51 51 51 99 ND 110 98 ND 110 Learn more here Learn more here

    Hardness - Water Quality Parameter Results (pdf)

  • Magnesium

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 8.2 ND 9.2 8.2 ND 8.9 Learn more here 400 (D)
    08/02/22-08/04/22 49 49 49 8.3 ND 9.5 8.3 ND 9 Learn more here 400 (D)
    11/02/22-11/04/22 50 50 50 7.8 ND 8.2 7.8 ND 8.2 Learn more here 400 (D)
    02/07/23-02/09/23 51 51 51 7.7 ND 8.8 7.7 ND 8.9 Learn more here 400 (D)

    Magnesium - Water Quality Parameter Results (pdf)

  • Orthophosphate

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 54 1 0.57 1.1 1 0.91 1.1 Learn more here Learn more here
    08/02/22-08/04/22 49 49 49 0.94 ND 1.4 0.94 0.67 1.1 Learn more here Learn more here
    11/02/22-11/04/22 50 50 50 0.955 0.032 1.2 0.955 0.038 1.1 Learn more here Learn more here
    02/07/23-02/09/23 51 51 51 1.1 0.52 1.2 1.1 1 1.4 Learn more here Learn more here

    Orthophosphate - Water Quality Parameter Results (pdf)

  • pH

    Samples Collected Range

    Number of locations sampled (number of initial samples/numbers of flushed samples)

    Range in initial samples (SU)

    Range in flushed samples (SU)

    US EPA Drinking Water Value (SU)

    Health-based Value (SU)

    Median

    Lowest

    Highest

    Median

    Lowest

    Highest
    05/17/22-05/19/22 54 ( 54 / 53 ) 8.04 7.67 8.75 7.97 7.66 8.56 6.5 - 8.5 (F) Learn more here
    08/02/22-08/04/22 48 ( 45 / 48 ) 8.08 6.76 9.25 7.965 6.73 8.9 6.5 - 8.5 (F) Learn more here
    11/02/22-11/04/22 50 ( 50 / 50 ) 7.58 7.02 8.78 7.75 6.97 8.71 6.5 - 8.5 (F) Learn more here
    02/07/23-02/09/23 51 ( 46 / 51 ) 7.67 7.12 8.3 7.65 7.14 8.19 6.5 - 8.5 (F) Learn more here

    pH - Water Quality Parameter Results (pdf)

  • Sodium

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 55 8.95 7.1 58 8.95 7.5 58 Learn more here Learn more here
    08/02/22-08/04/22 49 49 49 8.1 6.1 56 8.1 6 55 Learn more here Learn more here
    11/02/22-11/04/22 50 50 50 7.9 7 54 7.9 6.8 55 Learn more here Learn more here
    02/07/23-02/09/23 51 51 51 6.9 5.4 46 7 6.5 47 Learn more here Learn more here

    Sodium - Water Quality Parameter Results (pdf)

  • Sulfate

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 54 19 18 21 19 18 21 250 (F) 500 (E)
    08/02/22-08/04/22 49 49 49 17 ND 21 17 16 18 250 (F) 500 (E)
    11/02/22-11/04/22 50 50 50 18 17 20 18 16 20 250 (F) 500 (E)
    02/07/23-02/09/23 51 51 51 19 17 21 19 17 21 250 (F) 500 (E)

    Sulfate - Water Quality Parameter Results (pdf)

  • Total Alkalinity

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 54 79 75 81 79 77 81 Learn more here Learn more here
    08/02/22-08/04/22 49 49 49 79 74 81 79 76 80 Learn more here Learn more here
    11/02/22-11/04/22 50 50 50 77 74 79 77 74 78 Learn more here Learn more here
    02/07/23-02/09/23 51 51 51 75 57 80 75 55 79 Learn more here Learn more here

    Total Alkalinity - Water Quality Parameter Results (pdf)

  • Turbidity

    Parameter Number of Buildings Sampled Number of Initial Samples Number 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)
    05/17/22-05/19/22 55 55 54 ND ND ND ND ND ND Learn more here Learn more here
    08/02/22-08/04/22 49 49 49 ND ND ND ND ND ND Learn more here Learn more here
    11/02/22-11/04/22 50 50 50 ND ND 1.45 ND ND 1.57 Learn more here Learn more here
    02/07/23-02/09/23 51 51 51 ND ND 5.4 ND ND ND Learn more here Learn more here

    Turbidity - Water Quality Parameter Results (pdf)

Section 1: Metals

Section 2: Disinfectants, Disinfection Byproducts and Bacteria

Section 3: General Chemistry

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