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This is a rebuild of Drinking Water Watch and not yet the official record. Use the agency’s current Drinking Water Watch for anything you need to rely on.

Chemical and radiological sample results

MS0500009 , Central W/A-Southwest

39 of the 73 analytes this system has been tested for have been detected at least once, across 408 samples on record.

The other 34 were tested for and never found. An analyte is counted here if any result on record measured it, so this covers the whole history and not the samples listed below.

Across all 408 samples on record, detections range from October 8, 2003 to November 18, 2025. These figures cover the whole record.

What counts as a non-detect is defined in the help: Less than Indicator. This system’s violations.

What has been detected, ever

Every analyte measured above its reporting level at any point in this system’s record, most often detected first. This is not limited to the samples listed below.

Every analyte ever detected for Central W/A-Southwest, with how many results found it and when it was first and last detected. Covers the whole record, not only the samples listed below.
Analyte Kind Detected in First detected Last detected
Copper, Free 1022 Inorganic Chemical 160 of 160 results Jul 13, 2004 Aug 6, 2024
Lead 1030 Inorganic Chemical 94 of 160 results Jul 13, 2004 Aug 6, 2024
Barium 1010 Inorganic Chemical 24 of 24 results Oct 8, 2003 Mar 18, 2025
TTHM 2950 Organic Chemical 20 of 20 results Jul 21, 2004 Nov 18, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 19 of 20 results Aug 30, 2007 Nov 18, 2025
Sodium 1052 Inorganic Chemical 16 of 16 results May 17, 2016 Feb 25, 2025
Dichloroacetic Acid 2451 Organic Chemical 15 of 15 results Aug 30, 2007 Nov 18, 2025
Chloroform 2941 Organic Chemical 15 of 15 results Aug 30, 2007 Nov 18, 2025
Bromodichloromethane 2943 Organic Chemical 15 of 15 results Aug 30, 2007 Nov 18, 2025
Dibromochloromethane 2944 Organic Chemical 15 of 15 results Aug 30, 2007 Nov 18, 2025
Trichloroacetic Acid 2452 Organic Chemical 14 of 15 results Aug 30, 2007 Nov 18, 2025
Chromium 1020 Inorganic Chemical 14 of 24 results Oct 8, 2003 Apr 28, 2020
Fluoride 1025 Inorganic Chemical 12 of 31 results Oct 8, 2003 Mar 18, 2025
Nickel 1036 Inorganic Chemical 11 of 24 results Mar 10, 2004 Mar 18, 2025
Sulfate 1055 Inorganic Chemical 11 of 11 results Oct 8, 2003 Apr 7, 2017
Calcium 1016 Inorganic Chemical 7 of 7 results May 17, 2016 Apr 7, 2017
Chloride 1017 Inorganic Chemical 7 of 7 results May 17, 2016 Apr 7, 2017
Iron 1028 Inorganic Chemical 7 of 7 results May 17, 2016 Apr 7, 2017
Magnesium 1031 Inorganic Chemical 7 of 7 results May 17, 2016 Apr 7, 2017
Manganese 1032 Inorganic Chemical 7 of 7 results May 17, 2016 Apr 7, 2017
Potassium 1042 Inorganic Chemical 7 of 7 results May 17, 2016 Apr 7, 2017
Residue, Total, Filterable 1057 Water Quality 7 of 7 results May 17, 2016 Apr 7, 2017
Color 1905 Water Quality 7 of 7 results May 17, 2016 Apr 7, 2017
Hardness, Total (As Caco3) 1915 Water Quality 7 of 7 results May 17, 2016 Apr 7, 2017
Alkalinity, Total 1927 Water Quality 7 of 7 results May 17, 2016 Apr 7, 2017
Iron, Field Result FEFD Inorganic Chemical 7 of 7 results May 17, 2016 Apr 7, 2017
Calculated Sodium NACA Water Quality 7 of 7 results May 17, 2016 Apr 7, 2017
PH, Field Result PHFD Water Quality 7 of 7 results May 17, 2016 Apr 7, 2017
Carbon Dioxide 1901 Water Quality 6 of 6 results May 17, 2016 Apr 7, 2017
Gross Alpha, Incl. Radon & U 4002 Radionuclide 6 of 7 results Mar 12, 2012 Nov 19, 2013
Cyanide 1024 Inorganic Chemical 5 of 28 results Apr 4, 2005 Feb 24, 2021
Xylenes, Total 2955 Organic Chemical 5 of 63 results Sep 10, 2007 Aug 9, 2010
Selenium 1045 Inorganic Chemical 4 of 24 results Mar 10, 2004 Feb 24, 2010
Nitrate 1040 Inorganic Chemical 2 of 65 results Jul 19, 2006 Mar 29, 2021
Monobromoacetic Acid 2453 Organic Chemical 2 of 15 results Aug 30, 2007 Sep 21, 2020
Gross Alpha Particle Activity 4109 Radionuclide 2 of 2 results Sep 10, 2013 Sep 10, 2013
Nitrate-Nitrite 1038 Inorganic Chemical 1 of 65 results Mar 29, 2021 Mar 29, 2021
Alkalinity, Caco3 Stability 1067 Water Quality 1 of 1 result Apr 7, 2017 Apr 7, 2017
Ethylbenzene 2992 Organic Chemical 1 of 63 results Aug 9, 2010 Aug 9, 2010

No date range is applied: this list draws on every sample on record. Show the last two years only.

The most recent samples, result by result

The table below lists 271–280 of 408 samples, newest first — collected August 11, 2010 to August 30, 2010. The summary above covers all 408.

21 results from the 10 samples listed here: 16 detected, 5 not detected. Across the whole record it is 581 of 2,485. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.

Chemical and radiological sample results for Central W/A-Southwest, every result from 271 to 280 of 408 samples shown, newest first. Not detected means the amount was below the level the laboratory can reliably report, which is given beside it.
Result Analyte Monitoring period
Collected
Aug 30, 2010
Sampling point
TF107 Treatment Plant T107
Sample type
Routine
Lab sample
100831-043NI
Laboratory
MSDH Lab
Not detected below 0.25 mg/l Minimum Reporting Level , sample collected Aug 30, 2010, sampling point TF107 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.2 mg/l Minimum Reporting Level , sample collected Aug 30, 2010, sampling point TF107 Nitrate 1040 EPA method 353.2 Jan 1, 2010 – Dec 31, 2010
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Aug 30, 2010, sampling point TF107 Nitrite 1041 EPA method 353.2 Jan 1, 2010 – Dec 31, 2010
Collected
Aug 12, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100813-003PB
Laboratory
MSDH Lab
0.1372 mg/l , sample collected Aug 12, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 12, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Collected
Aug 11, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100812-039PB
Laboratory
MSDH Lab
0.3404 mg/l , sample collected Aug 11, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.0012 mg/l , sample collected Aug 11, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Collected
Aug 11, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100812-023PB
Laboratory
MSDH Lab
0.0471 mg/l , sample collected Aug 11, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.0012 mg/l , sample collected Aug 11, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Collected
Aug 11, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100812-022PB
Laboratory
MSDH Lab
0.8978 mg/l , sample collected Aug 11, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.002 mg/l , sample collected Aug 11, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Collected
Aug 11, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100812-020PB
Laboratory
MSDH Lab
0.0268 mg/l , sample collected Aug 11, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.0009 mg/l , sample collected Aug 11, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Collected
Aug 11, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100812-019PB
Laboratory
MSDH Lab
0.3439 mg/l , sample collected Aug 11, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Aug 11, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Collected
Aug 11, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100812-018PB
Laboratory
MSDH Lab
0.4913 mg/l , sample collected Aug 11, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.0007 mg/l , sample collected Aug 11, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Collected
Aug 11, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100812-012PB
Laboratory
MSDH Lab
0.0547 mg/l , sample collected Aug 11, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.001 mg/l , sample collected Aug 11, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Collected
Aug 11, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100812-011PB
Laboratory
MSDH Lab
0.4968 mg/l , sample collected Aug 11, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.0013 mg/l , sample collected Aug 11, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010

Routine (10).