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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 261–270 of 357 samples, newest first — collected March 31, 2015 to November 5, 2015. The summary above covers all 357.

39 results from the 10 samples listed here: 13 detected, 26 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 261 to 270 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
Nov 5, 2015 05:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
151106-022PB
Laboratory
MSDH Lab
1.0577 mg/l , sample collected Nov 5, 2015 05:30, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jul 1, 2015 – Dec 31, 2015
0.0054 mg/l , sample collected Nov 5, 2015 05:30, sampling point DS000 Lead 1030 EPA method 200.8 Jul 1, 2015 – Dec 31, 2015
Collected
Nov 5, 2015 04:00
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
151106-021PB
Laboratory
MSDH Lab
0.0703 mg/l , sample collected Nov 5, 2015 04:00, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jul 1, 2015 – Dec 31, 2015
0.0032 mg/l , sample collected Nov 5, 2015 04:00, sampling point DS000 Lead 1030 EPA method 200.8 Jul 1, 2015 – Dec 31, 2015
Collected
Oct 6, 2015 03:00
Sampling point
TF080 Treatment PLT T080
Sample type
Routine
Lab sample
151007-007VO
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 6, 2015 03:00, sampling point TF080 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 6, 2015 03:00, sampling point TF080 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 6, 2015 03:00, sampling point TF080 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 6, 2015 03:00, sampling point TF080 Dichloromethane 2964 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 6, 2015 03:00, sampling point TF080 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 6, 2015 03:00, sampling point TF080 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 6, 2015 03:00, sampling point TF080 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 6, 2015 03:00, sampling point TF080 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 6, 2015 03:00, sampling point TF080 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 6, 2015 03:00, sampling point TF080 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 6, 2015 03:00, sampling point TF080 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 6, 2015 03:00, sampling point TF080 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 6, 2015 03:00, sampling point TF080 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 6, 2015 03:00, sampling point TF080 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 6, 2015 03:00, sampling point TF080 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 6, 2015 03:00, sampling point TF080 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 6, 2015 03:00, sampling point TF080 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 6, 2015 03:00, sampling point TF080 Benzene 2990 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 6, 2015 03:00, sampling point TF080 Toluene 2991 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 6, 2015 03:00, sampling point TF080 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 6, 2015 03:00, sampling point TF080 Styrene 2996 EPA method 524.2 Jan 1, 2011 – Dec 31, 2016
Collected
Sep 9, 2015 05:00
Sampling point
TF080 Treatment PLT T080
Sample type
Routine
Lab sample
150910-074PB
Laboratory
MSDH Lab
0.8583 mg/l , sample collected Sep 9, 2015 05:00, sampling point TF080 Copper, Free 1022 EPA method 200.8 Not recorded
0.003 mg/l , sample collected Sep 9, 2015 05:00, sampling point TF080 Lead 1030 EPA method 200.8 Not recorded
Collected
Jun 8, 2015 03:48
Sampling point
TF080 Treatment PLT T080
Sample type
Routine
Lab sample
150609-021CN
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Jun 8, 2015 03:48, sampling point TF080 Cyanide 1024 EPA method QC10204001X Jan 1, 2014 – Dec 31, 2016
Collected
Apr 8, 2015 12:31
Sampling point
TF080 Treatment PLT T080
Sample type
Routine
Lab sample
150409-033NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 8, 2015 12:31, sampling point TF080 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2015 – Dec 31, 2015
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 8, 2015 12:31, sampling point TF080 Nitrate 1040 EPA method QC10107041C Jan 1, 2015 – Dec 31, 2015
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 8, 2015 12:31, sampling point TF080 Nitrite 1041 EPA method QC10107041C Jan 1, 2015 – Dec 31, 2015
Collected
Mar 31, 2015 05:02
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
150401-091PB
Laboratory
MSDH Lab
0.0279 mg/l , sample collected Mar 31, 2015 05:02, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Jun 30, 2015
0.0016 mg/l , sample collected Mar 31, 2015 05:02, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Jun 30, 2015
Collected
Mar 31, 2015 04:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
150401-090PB
Laboratory
MSDH Lab
0.0043 mg/l , sample collected Mar 31, 2015 04:30, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Jun 30, 2015
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 31, 2015 04:30, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Jun 30, 2015
Collected
Mar 31, 2015 03:27
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
150401-089PB
Laboratory
MSDH Lab
0.0029 mg/l , sample collected Mar 31, 2015 03:27, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Jun 30, 2015
0.0006 mg/l , sample collected Mar 31, 2015 03:27, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Jun 30, 2015
Collected
Mar 31, 2015 07:30
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
150401-088PB
Laboratory
MSDH Lab
0.0294 mg/l , sample collected Mar 31, 2015 07:30, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2015 – Jun 30, 2015
0.0012 mg/l , sample collected Mar 31, 2015 07:30, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2015 – Jun 30, 2015

Routine (10).