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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 301–310 of 357 samples, newest first — collected February 13, 2012 to September 26, 2012. The summary above covers all 357.

34 results from the 10 samples listed here: 7 detected, 27 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 301 to 310 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
Sep 26, 2012 02:55
Sampling point
TF080 Treatment PLT T080
Sample type
Routine
Lab sample
120927-005CN
Laboratory
MSDH Lab
Not detected below 15 ug/l Minimum Reporting Level , sample collected Sep 26, 2012 02:55, sampling point TF080 Cyanide 1024 EPA method QC10204001X Jan 1, 2011 – Dec 31, 2013
Collected
Jul 17, 2012 15:10
Sampling point
TF080 Treatment PLT T080
Sample type
Routine
Lab sample
201211140293
Laboratory
Radiation Safety Engineering
1.4 pci/l , sample collected Jul 17, 2012 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 Jul 17, 2012 15:10, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.355 pci/l Minimum Reporting Level , sample collected Jul 17, 2012 15:10, sampling point TF080 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.39 pci/l Minimum Reporting Level , sample collected Jul 17, 2012 15:10, sampling point TF080 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 16, 2012 14:00
Sampling point
TF080 Treatment PLT T080
Sample type
Routine
Lab sample
120717-039
Laboratory
Radiation Safety Engineering
1.4 pci/l , sample collected Jul 16, 2012 14:00, 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 Jul 16, 2012 14:00, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.355 pci/l Minimum Reporting Level , sample collected Jul 16, 2012 14:00, sampling point TF080 Radium-226 4020 EPA method 903.1 Jul 1, 2012 – Sep 30, 2012
Not detected below 0.39 pci/l Minimum Reporting Level , sample collected Jul 16, 2012 14:00, sampling point TF080 Radium-228 4030 EPA method 904.0 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 16, 2012 14:00
Sampling point
TF080 Treatment PLT T080
Sample type
Routine
Lab sample
120717-039RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 16, 2012 14:00, sampling point TF080 Combined Uranium 4006 EPA method 200.8 Jul 1, 2012 – Sep 30, 2012
Collected
Jul 16, 2012 02:05
Sampling point
TF080 Treatment PLT T080
Sample type
Routine
Lab sample
120717-026IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 16, 2012 02:05, sampling point TF080 Arsenic 1005 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.06406 mg/l , sample collected Jul 16, 2012 02:05, sampling point TF080 Barium 1010 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 16, 2012 02:05, sampling point TF080 Cadmium 1015 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.00116 mg/l , sample collected Jul 16, 2012 02:05, sampling point TF080 Chromium 1020 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jul 16, 2012 02:05, sampling point TF080 Fluoride 1025 EPA method 380-75WE Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 16, 2012 02:05, sampling point TF080 Mercury 1035 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
0.00116 mg/l , sample collected Jul 16, 2012 02:05, sampling point TF080 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Jul 16, 2012 02:05, sampling point TF080 Selenium 1045 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 16, 2012 02:05, sampling point TF080 Antimony, Total 1074 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 16, 2012 02:05, sampling point TF080 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Jul 16, 2012 02:05, sampling point TF080 Thallium, Total 1085 EPA method 200.8 Jan 1, 2011 – Dec 31, 2013
Collected
Apr 23, 2012 14:22
Sampling point
TF080 Treatment PLT T080
Sample type
Routine
Lab sample
120424-096
Laboratory
Radiation Safety Engineering
1.4 pci/l , sample collected Apr 23, 2012 14:22, 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 Apr 23, 2012 14:22, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.355 pci/l Minimum Reporting Level , sample collected Apr 23, 2012 14:22, sampling point TF080 Radium-226 4020 EPA method 903.1 Apr 1, 2012 – Jun 30, 2012
Not detected below 0.39 pci/l Minimum Reporting Level , sample collected Apr 23, 2012 14:22, sampling point TF080 Radium-228 4030 EPA method 904.0 Apr 1, 2012 – Jun 30, 2012
Collected
Apr 23, 2012 14:22
Sampling point
TF080 Treatment PLT T080
Sample type
Routine
Lab sample
120424-096RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 23, 2012 14:22, sampling point TF080 Combined Uranium 4006 EPA method 200.8 Apr 1, 2012 – Jun 30, 2012
Collected
Mar 5, 2012 01:15
Sampling point
TF080 Treatment PLT T080
Sample type
Routine
Lab sample
120306-095NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 5, 2012 01:15, sampling point TF080 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 5, 2012 01:15, sampling point TF080 Nitrate 1040 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 5, 2012 01:15, sampling point TF080 Nitrite 1041 EPA method 353.2 Jan 1, 2012 – Dec 31, 2012
Collected
Feb 13, 2012 12:35
Sampling point
TF080 Treatment PLT T080
Sample type
Routine
Lab sample
120214-002
Laboratory
Radiation Safety Engineering
1.4 pci/l , sample collected Feb 13, 2012 12:35, 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 Feb 13, 2012 12:35, sampling point TF080 Combined Radium (-226 & -228) 4010 Not recorded
Not detected below 0.355 pci/l Minimum Reporting Level , sample collected Feb 13, 2012 12:35, sampling point TF080 Radium-226 4020 EPA method 903.1 Jan 1, 2012 – Mar 31, 2012
Not detected below 0.39 pci/l Minimum Reporting Level , sample collected Feb 13, 2012 12:35, sampling point TF080 Radium-228 4030 EPA method 904.0 Jan 1, 2012 – Mar 31, 2012
Collected
Feb 13, 2012 12:35
Sampling point
TF080 Treatment PLT T080
Sample type
Routine
Lab sample
120214-002RU
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 13, 2012 12:35, sampling point TF080 Combined Uranium 4006 EPA method 200.8 Jan 1, 2012 – Mar 31, 2012

Routine (10).