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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

MS0310005 , Town of Heidelberg

25 of the 57 analytes this system has been tested for have been detected at least once, across 229 samples on record.

The other 32 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 229 samples on record, detections range from September 29, 2003 to July 27, 2026. These figures cover the whole record; the list of samples further down is narrowed.

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 Town of Heidelberg, 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 73 of 73 results Aug 8, 2007 Jul 27, 2026
Lead 1030 Inorganic Chemical 59 of 73 results Aug 8, 2007 Jul 27, 2026
Barium 1010 Inorganic Chemical 22 of 22 results Sep 29, 2003 Jul 8, 2026
Fluoride 1025 Inorganic Chemical 22 of 22 results Sep 29, 2003 Jul 8, 2026
TTHM 2950 Organic Chemical 19 of 20 results Aug 9, 2007 Aug 21, 2025
Chloroform 2941 Organic Chemical 15 of 15 results Aug 9, 2007 Aug 21, 2025
Bromodichloromethane 2943 Organic Chemical 15 of 15 results Aug 9, 2007 Aug 21, 2025
Dibromochloromethane 2944 Organic Chemical 15 of 15 results Aug 9, 2007 Aug 21, 2025
Bromoform 2942 Organic Chemical 14 of 15 results Sep 24, 2008 Aug 21, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 14 of 19 results Sep 27, 2007 Jun 2, 2025
Trichloroacetic Acid 2452 Organic Chemical 13 of 15 results Sep 27, 2007 Jun 2, 2025
Chromium 1020 Inorganic Chemical 13 of 22 results Sep 29, 2003 May 16, 2022
Dibromoacetic Acid 2454 Organic Chemical 11 of 15 results Sep 27, 2007 Jun 2, 2025
Dichloroacetic Acid 2451 Organic Chemical 9 of 15 results Sep 27, 2007 Jun 2, 2025
Sodium 1052 Inorganic Chemical 6 of 6 results Sep 19, 2019 Feb 3, 2025
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 10 results Dec 8, 2011 Jul 18, 2012
Nickel 1036 Inorganic Chemical 4 of 20 results Feb 25, 2004 Nov 9, 2009
Sulfate 1055 Inorganic Chemical 4 of 4 results Sep 29, 2003 Feb 25, 2004
Xylenes, Total 2955 Organic Chemical 1 of 14 results Jun 7, 2022 Jun 7, 2022
Monochloroacetic Acid 2450 Organic Chemical 1 of 15 results Aug 7, 2018 Aug 7, 2018
Cyanide 1024 Inorganic Chemical 1 of 20 results Sep 14, 2009 Sep 14, 2009
Monobromoacetic Acid 2453 Organic Chemical 1 of 15 results Sep 27, 2007 Sep 27, 2007
Nitrate-Nitrite 1038 Inorganic Chemical 1 of 45 results May 7, 2007 May 7, 2007
Nitrate 1040 Inorganic Chemical 1 of 45 results May 7, 2007 May 7, 2007
Selenium 1045 Inorganic Chemical 1 of 22 results Feb 15, 2006 Feb 15, 2006

Showing samples collected between September 26, 2024 and September 26, 2026. That is this page’s default, not a limit on what the agency records.

Show every sample on record

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The most recent samples, result by result

The table below lists 11–20 of 25 samples, newest first — collected February 24, 2025 to July 8, 2026. The summary above covers all 25.

64 results from the 10 samples listed here: 17 detected, 47 not detected. Across the whole record it is 340 of 1,069. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.

Units in this table

Antimony, Total is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.

Arsenic is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.

Barium is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.

Beryllium, Total is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.

Cadmium is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.

Chromium is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.

Mercury is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.

Selenium is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.

Thallium, Total is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.

We withheld the location of 1 sampling point below. The location on record identifies a private home, and we do not publish those. That is our decision, not the agency’s. The sampling point, its type and every result taken there are published unchanged.

Chemical and radiological sample results for Town of Heidelberg, every result from 11 to 20 of 25 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
Jul 8, 2026
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
35051400002
Laboratory
Pace Analytical Services, LLC
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 8, 2026, sampling point TF103 Arsenic 1005 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
6.7 ug/l , sample collected Jul 8, 2026, sampling point TF103 Barium 1010 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Jul 8, 2026, sampling point TF103 Cadmium 1015 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
Not detected below 2 ug/l Minimum Reporting Level , sample collected Jul 8, 2026, sampling point TF103 Chromium 1020 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
0.22 mg/l , sample collected Jul 8, 2026, sampling point TF103 Fluoride 1025 EPA method 300.0 Jan 1, 2026 – Dec 31, 2028
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Jul 8, 2026, sampling point TF103 Mercury 1035 EPA method 245.1 Jan 1, 2026 – Dec 31, 2028
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 8, 2026, sampling point TF103 Selenium 1045 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 8, 2026, sampling point TF103 Antimony, Total 1074 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Jul 8, 2026, sampling point TF103 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 8, 2026, sampling point TF103 Thallium, Total 1085 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
Collected
Jul 8, 2026
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
35051400001
Laboratory
Pace Analytical Services, LLC
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 8, 2026, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
11.3 ug/l , sample collected Jul 8, 2026, sampling point TF102 Barium 1010 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Jul 8, 2026, sampling point TF102 Cadmium 1015 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
Not detected below 2 ug/l Minimum Reporting Level , sample collected Jul 8, 2026, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
0.18 mg/l , sample collected Jul 8, 2026, sampling point TF102 Fluoride 1025 EPA method 300.0 Jan 1, 2026 – Dec 31, 2028
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Jul 8, 2026, sampling point TF102 Mercury 1035 EPA method 245.1 Jan 1, 2026 – Dec 31, 2028
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 8, 2026, sampling point TF102 Selenium 1045 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 8, 2026, sampling point TF102 Antimony, Total 1074 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Jul 8, 2026, sampling point TF102 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 8, 2026, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2026 – Dec 31, 2028
Collected
May 13, 2026 13:38
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
810-192134-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected May 13, 2026 13:38, sampling point DS000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected May 13, 2026 13:38, sampling point DS000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected May 13, 2026 13:38, sampling point DS000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected May 13, 2026 13:38, sampling point DS000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected May 13, 2026 13:38, sampling point DS000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 2 ug/l Minimum Reporting Level , sample collected May 13, 2026 13:38, sampling point DS000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Not recorded
Collected
Aug 21, 2025 11:40
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
810-161156-1
Laboratory
Eurofins Eaton Analytical South Bend in
2 ug/l , sample collected Aug 21, 2025 11:40, sampling point SM1 Chloroform 2941 EPA method 524.2 Not recorded
18 ug/l , sample collected Aug 21, 2025 11:40, sampling point SM1 Bromoform 2942 EPA method 524.2 Not recorded
3.1 ug/l , sample collected Aug 21, 2025 11:40, sampling point SM1 Bromodichloromethane 2943 EPA method 524.2 Not recorded
8.9 ug/l , sample collected Aug 21, 2025 11:40, sampling point SM1 Dibromochloromethane 2944 EPA method 524.2 Not recorded
32 ug/l , sample collected Aug 21, 2025 11:40, sampling point SM1 TTHM 2950 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Collected
Aug 18, 2025 14:20
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
CN-250819-039
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Aug 18, 2025 14:20, sampling point TF103 Cyanide 1024 EPA method QC10204001X Jan 1, 2023 – Dec 31, 2025
Collected
Aug 18, 2025 13:50
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
CN-250819-043
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Aug 18, 2025 13:50, sampling point TF102 Cyanide 1024 EPA method QC10204001X Jan 1, 2023 – Dec 31, 2025
Collected
Jun 2, 2025 12:40
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
810-150742-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Jun 2, 2025 12:40, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
1.8 ug/l , sample collected Jun 2, 2025 12:40, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
1.5 ug/l , sample collected Jun 2, 2025 12:40, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 2, 2025 12:40, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
4.6 ug/l , sample collected Jun 2, 2025 12:40, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
7.9 ug/l , sample collected Jun 2, 2025 12:40, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2025 – Dec 31, 2025
Collected
Feb 24, 2025 12:02
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
IN-250225-032
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 12:02, sampling point TF103 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0093 mg/l , sample collected Feb 24, 2025 12:02, sampling point TF103 Barium 1010 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 12:02, sampling point TF103 Cadmium 1015 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 12:02, sampling point TF103 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.245 mg/l , sample collected Feb 24, 2025 12:02, sampling point TF103 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 12:02, sampling point TF103 Mercury 1035 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 12:02, sampling point TF103 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 12:02, sampling point TF103 Selenium 1045 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 12:02, sampling point TF103 Antimony, Total 1074 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 12:02, sampling point TF103 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 12:02, sampling point TF103 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Feb 24, 2025 12:17
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
IN-250225-031
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 12:17, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0092 mg/l , sample collected Feb 24, 2025 12:17, sampling point TF102 Barium 1010 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 12:17, sampling point TF102 Cadmium 1015 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 12:17, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.204 mg/l , sample collected Feb 24, 2025 12:17, sampling point TF102 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 12:17, sampling point TF102 Mercury 1035 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 12:17, sampling point TF102 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 12:17, sampling point TF102 Selenium 1045 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 12:17, sampling point TF102 Antimony, Total 1074 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 12:17, sampling point TF102 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 12:17, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Feb 24, 2025 12:05
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
NI-250225-038
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 12:05, sampling point TF103 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 12:05, sampling point TF103 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 12:05, sampling point TF103 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025

Routine (10).