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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

MS0490006 , North District 1 Water Assn.

21 of the 55 analytes this system has been tested for have been detected at least once, across 357 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 357 samples on record, detections range from May 24, 2004 to June 23, 2026. 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 North District 1 Water Assn., 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 262 of 262 results Aug 6, 2008 Jul 2, 2025
Lead 1030 Inorganic Chemical 211 of 262 results Aug 6, 2008 Jul 2, 2025
TTHM 2950 Organic Chemical 12 of 19 results Jul 19, 2004 Nov 19, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 10 of 22 results Jun 16, 2010 Nov 5, 2024
Barium 1010 Inorganic Chemical 9 of 9 results Nov 15, 2004 Jun 23, 2026
Chloroform 2941 Organic Chemical 8 of 13 results Sep 28, 2020 Nov 19, 2025
Bromodichloromethane 2943 Organic Chemical 5 of 13 results Sep 28, 2020 Nov 19, 2025
Nickel 1036 Inorganic Chemical 5 of 8 results Nov 15, 2004 Mar 17, 2025
Dichloroacetic Acid 2451 Organic Chemical 5 of 16 results Sep 28, 2020 Nov 5, 2024
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 5 results Dec 15, 2011 Jul 17, 2012
Sodium 1052 Inorganic Chemical 4 of 4 results Sep 16, 2019 Jun 23, 2026
Dibromochloromethane 2944 Organic Chemical 4 of 13 results Sep 28, 2020 Nov 5, 2024
Chromium 1020 Inorganic Chemical 4 of 9 results Apr 4, 2005 May 6, 2019
Bromoform 2942 Organic Chemical 3 of 13 results Sep 28, 2020 Nov 5, 2024
Dibromoacetic Acid 2454 Organic Chemical 3 of 16 results Sep 28, 2020 Aug 20, 2024
Trichloroacetic Acid 2452 Organic Chemical 3 of 16 results Aug 27, 2007 May 22, 2024
Fluoride 1025 Inorganic Chemical 1 of 9 results Jun 23, 2026 Jun 23, 2026
Monobromoacetic Acid 2453 Organic Chemical 1 of 16 results Aug 19, 2019 Aug 19, 2019
Cadmium 1015 Inorganic Chemical 1 of 9 results Apr 4, 2005 Apr 4, 2005
Selenium 1045 Inorganic Chemical 1 of 9 results Apr 4, 2005 Apr 4, 2005
Nitrite 1041 Inorganic Chemical 1 of 22 results May 24, 2004 May 24, 2004

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 311–320 of 357 samples, newest first — collected August 18, 2011 to December 15, 2011. The summary above covers all 357.

22 results from the 10 samples listed here: 19 detected, 3 not detected. Across the whole record it is 558 of 1,045. 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 North District 1 Water Assn., every result from 311 to 320 of 357 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
Dec 15, 2011 15:10
Sampling point
TF080 Treatment PLT T080
Sample type
Routine
Lab sample
111216-035
Laboratory
Radiation Safety Engineering
1.4 pci/l , sample collected Dec 15, 2011 15:10, sampling point TF080 Gross Alpha, Incl. Radon & U 4002 EPA method 00-02 Not recorded
Not detected below 0.39 pci/l Minimum Reporting Level , sample collected Dec 15, 2011 15:10, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.355 pci/l Minimum Reporting Level , sample collected Dec 15, 2011 15:10, sampling point TF080 Radium-226 4020 EPA method 903.1 Oct 1, 2011 – Dec 31, 2011
Not detected below 0.39 pci/l Minimum Reporting Level , sample collected Dec 15, 2011 15:10, sampling point TF080 Radium-228 4030 EPA method 904.0 Oct 1, 2011 – Dec 31, 2011
Collected
Aug 18, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110819-018PB
Laboratory
MSDH Lab
0.0134 mg/l , sample collected Aug 18, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0011 mg/l , sample collected Aug 18, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Aug 18, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110819-016PB
Laboratory
MSDH Lab
0.0224 mg/l , sample collected Aug 18, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0016 mg/l , sample collected Aug 18, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Aug 18, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110819-015PB
Laboratory
MSDH Lab
0.0156 mg/l , sample collected Aug 18, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0012 mg/l , sample collected Aug 18, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Aug 18, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110819-009PB
Laboratory
MSDH Lab
0.0126 mg/l , sample collected Aug 18, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0013 mg/l , sample collected Aug 18, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Aug 18, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110819-008PB
Laboratory
MSDH Lab
0.01 mg/l , sample collected Aug 18, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0027 mg/l , sample collected Aug 18, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Aug 18, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110819-007PB
Laboratory
MSDH Lab
0.0111 mg/l , sample collected Aug 18, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0014 mg/l , sample collected Aug 18, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Aug 18, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110819-017PB
Laboratory
MSDH Lab
0.0151 mg/l , sample collected Aug 18, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0012 mg/l , sample collected Aug 18, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Aug 18, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110819-019PB
Laboratory
MSDH Lab
0.0701 mg/l , sample collected Aug 18, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0051 mg/l , sample collected Aug 18, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
Collected
Aug 18, 2011
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
110819-006PB
Laboratory
MSDH Lab
0.0093 mg/l , sample collected Aug 18, 2011, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011
0.0012 mg/l , sample collected Aug 18, 2011, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2009 – Dec 31, 2011

Routine (10).