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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

MS0300044 , Gulf Park

44 of the 74 analytes this system has been tested for have been detected at least once, across 791 samples on record.

The other 30 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 791 samples on record, detections range from August 12, 2002 to June 17, 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 Gulf Park, 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 142 of 142 results Aug 30, 2007 Oct 15, 2024
TTHM 2950 Organic Chemical 115 of 115 results Sep 8, 2004 Feb 24, 2026
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 110 of 111 results Oct 27, 2005 Jun 17, 2026
Chloroform 2941 Organic Chemical 80 of 80 results Sep 20, 2006 Feb 24, 2026
Dichloroacetic Acid 2451 Organic Chemical 76 of 76 results Jan 31, 2008 Jun 17, 2026
Trichloroacetic Acid 2452 Organic Chemical 73 of 76 results Jan 31, 2008 Jun 17, 2026
Fluoride 1025 Inorganic Chemical 73 of 73 results Sep 15, 2003 Apr 14, 2025
Lead 1030 Inorganic Chemical 73 of 142 results Aug 30, 2007 Oct 15, 2024
Bromodichloromethane 2943 Organic Chemical 71 of 80 results Sep 20, 2006 Feb 24, 2026
Barium 1010 Inorganic Chemical 68 of 68 results Sep 15, 2003 Apr 14, 2025
Chromium 1020 Inorganic Chemical 38 of 68 results Sep 15, 2003 Apr 14, 2025
Dibromochloromethane 2944 Organic Chemical 25 of 80 results Sep 20, 2006 Feb 24, 2026
Gross Alpha, Incl. Radon & U 4002 Radionuclide 17 of 17 results Dec 15, 2011 Mar 30, 2015
Sulfate 1055 Inorganic Chemical 17 of 19 results Sep 15, 2003 Dec 2, 2008
Dibromoacetic Acid 2454 Organic Chemical 14 of 76 results Jun 8, 2015 Jun 6, 2019
Sodium 1052 Inorganic Chemical 13 of 13 results Dec 2, 2008 Feb 20, 2024
Bromoform 2942 Organic Chemical 13 of 80 results Sep 20, 2006 Nov 29, 2016
Selenium 1045 Inorganic Chemical 13 of 68 results Feb 23, 2004 Feb 15, 2006
Monochloroacetic Acid 2450 Organic Chemical 10 of 76 results Jan 31, 2008 Dec 12, 2019
Arsenic 1005 Inorganic Chemical 5 of 68 results Mar 16, 2005 Feb 21, 2023
Calcium 1016 Inorganic Chemical 5 of 5 results Dec 2, 2008 Dec 2, 2008
Chloride 1017 Inorganic Chemical 5 of 5 results Dec 2, 2008 Dec 2, 2008
Manganese 1032 Inorganic Chemical 5 of 5 results Dec 2, 2008 Dec 2, 2008
Potassium 1042 Inorganic Chemical 5 of 5 results Dec 2, 2008 Dec 2, 2008
Residue, Total, Filterable 1057 Water Quality 5 of 5 results Dec 2, 2008 Dec 2, 2008
Alkalinity, Caco3 Stability 1067 Water Quality 5 of 5 results Dec 2, 2008 Dec 2, 2008
Carbon Dioxide 1901 Water Quality 5 of 5 results Dec 2, 2008 Dec 2, 2008
Color 1905 Water Quality 5 of 5 results Dec 2, 2008 Dec 2, 2008
Hardness, Total (As Caco3) 1915 Water Quality 5 of 5 results Dec 2, 2008 Dec 2, 2008
PH 1925 Water Quality 5 of 5 results Dec 2, 2008 Dec 2, 2008
Alkalinity, Total 1927 Water Quality 5 of 5 results Dec 2, 2008 Dec 2, 2008
Calculated Sodium NACA Water Quality 5 of 5 results Dec 2, 2008 Dec 2, 2008
PH, Field Result PHFD Water Quality 5 of 5 results Dec 2, 2008 Dec 2, 2008
Cadmium 1015 Inorganic Chemical 5 of 68 results Mar 16, 2005 Mar 16, 2005
Nickel 1036 Inorganic Chemical 4 of 68 results Jan 14, 2009 Apr 14, 2025
Temperature, Field Result TEMP Water Quality 4 of 4 results Dec 2, 2008 Dec 2, 2008
Cyanide 1024 Inorganic Chemical 3 of 71 results Sep 16, 2009 Aug 19, 2025
Xylenes, Total 2955 Organic Chemical 3 of 79 results Aug 12, 2002 Aug 18, 2003
Nitrate 1040 Inorganic Chemical 2 of 142 results May 17, 2004 Aug 10, 2005
Magnesium 1031 Inorganic Chemical 1 of 5 results Dec 2, 2008 Dec 2, 2008
Thallium, Total 1085 Inorganic Chemical 1 of 68 results Mar 16, 2005 Mar 16, 2005
Nitrate-Nitrite 1038 Inorganic Chemical 1 of 142 results May 17, 2004 May 17, 2004
Mercury 1035 Inorganic Chemical 1 of 68 results Feb 23, 2004 Feb 23, 2004
Ethylbenzene 2992 Organic Chemical 1 of 79 results Aug 12, 2002 Aug 12, 2002

Showing samples collected between September 25, 2024 and September 25, 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 38 samples, newest first — collected February 24, 2025 to August 19, 2025. The summary above covers all 38.

53 results from the 10 samples listed here: 9 detected, 44 not detected. Across the whole record it is 1,137 of 4,341. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.

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 Gulf Park, every result from 11 to 20 of 38 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 19, 2025 07:00
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
CN-250820-020
Laboratory
MSDH Lab
0.0443 mg/l , sample collected Aug 19, 2025 07:00, sampling point TF101 Cyanide 1024 EPA method QC10204001X Jan 1, 2023 – Dec 31, 2025
Collected
Jun 3, 2025 11:15
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
810-150884-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Jun 3, 2025 11:15, sampling point SM1 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
9.9 ug/l , sample collected Jun 3, 2025 11:15, sampling point SM1 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
11 ug/l , sample collected Jun 3, 2025 11:15, sampling point SM1 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 3, 2025 11:15, sampling point SM1 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 3, 2025 11:15, sampling point SM1 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
20.9 ug/l , sample collected Jun 3, 2025 11:15, sampling point SM1 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2025 – Dec 31, 2025
Collected
Apr 30, 2025 08:40
Sampling point
TF110 Treatment Plant TF110
Sample type
Routine
Lab sample
CN-250501-005
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Apr 30, 2025 08:40, sampling point TF110 Cyanide 1024 EPA method QC10204001X Jan 1, 2025 – Dec 31, 2025
Collected
Apr 14, 2025 10:00
Sampling point
TF110 Treatment Plant TF110
Sample type
Routine
Lab sample
IN-250415-006
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 14, 2025 10:00, sampling point TF110 Arsenic 1005 EPA method 200.8 Jan 1, 2025 – Dec 31, 2025
0.0038 mg/l , sample collected Apr 14, 2025 10:00, sampling point TF110 Barium 1010 EPA method 200.8 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 14, 2025 10:00, sampling point TF110 Cadmium 1015 EPA method 200.8 Jan 1, 2025 – Dec 31, 2025
0.0032 mg/l , sample collected Apr 14, 2025 10:00, sampling point TF110 Chromium 1020 EPA method 200.8 Jan 1, 2025 – Dec 31, 2025
0.491 mg/l , sample collected Apr 14, 2025 10:00, sampling point TF110 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2025 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 14, 2025 10:00, sampling point TF110 Mercury 1035 EPA method 200.8 Jan 1, 2025 – Dec 31, 2025
0.002 mg/l , sample collected Apr 14, 2025 10:00, sampling point TF110 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Apr 14, 2025 10:00, sampling point TF110 Selenium 1045 EPA method 200.8 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 14, 2025 10:00, sampling point TF110 Antimony, Total 1074 EPA method 200.8 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 14, 2025 10:00, sampling point TF110 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Apr 14, 2025 10:00, sampling point TF110 Thallium, Total 1085 EPA method 200.8 Jan 1, 2025 – Dec 31, 2025
Collected
Mar 26, 2025 10:46
Sampling point
SM1 Location withheld
Sample type
Routine
Lab sample
TH-250327-009
Laboratory
MSDH Lab
62.9 ug/l , sample collected Mar 26, 2025 10:46, sampling point SM1 TTHM 2950 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Collected
Feb 24, 2025 11:50
Sampling point
TF110 Treatment Plant TF110
Sample type
Routine
Lab sample
VO-250225-017
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 24, 2025 11:50, sampling point TF110 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 24, 2025 11:50, sampling point TF110 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 24, 2025 11:50, sampling point TF110 Xylenes, Total 2955 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 24, 2025 11:50, sampling point TF110 Dichloromethane 2964 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 24, 2025 11:50, sampling point TF110 O-Dichlorobenzene 2968 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 24, 2025 11:50, sampling point TF110 P-Dichlorobenzene 2969 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 24, 2025 11:50, sampling point TF110 Vinyl Chloride 2976 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 24, 2025 11:50, sampling point TF110 1,1-Dichloroethylene 2977 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 24, 2025 11:50, sampling point TF110 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 24, 2025 11:50, sampling point TF110 1,2-Dichloroethane 2980 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 24, 2025 11:50, sampling point TF110 1,1,1-Trichloroethane 2981 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 24, 2025 11:50, sampling point TF110 Carbon Tetrachloride 2982 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 24, 2025 11:50, sampling point TF110 1,2-Dichloropropane 2983 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 24, 2025 11:50, sampling point TF110 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 24, 2025 11:50, sampling point TF110 1,1,2-Trichloroethane 2985 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 24, 2025 11:50, sampling point TF110 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 24, 2025 11:50, sampling point TF110 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 24, 2025 11:50, sampling point TF110 Benzene 2990 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 24, 2025 11:50, sampling point TF110 Toluene 2991 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 24, 2025 11:50, sampling point TF110 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Feb 24, 2025 11:50, sampling point TF110 Styrene 2996 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Collected
Feb 24, 2025 10:47
Sampling point
TF110 Treatment Plant TF110
Sample type
Routine
Lab sample
NI-250225-022
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 10:47, sampling point TF110 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 10:47, sampling point TF110 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 10:47, sampling point TF110 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Feb 24, 2025 10:33
Sampling point
TF109 Treatment Plant T109
Sample type
Routine
Lab sample
NI-250225-021
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 10:33, sampling point TF109 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 10:33, sampling point TF109 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 10:33, sampling point TF109 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Feb 24, 2025 10:11
Sampling point
TF108 Treatment Plant T108
Sample type
Routine
Lab sample
NI-250225-020
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 10:11, sampling point TF108 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 10:11, sampling point TF108 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 10:11, sampling point TF108 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Feb 24, 2025 09:19
Sampling point
TF107 Treatment Plant T107
Sample type
Routine
Lab sample
NI-250225-019
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 24, 2025 09:19, sampling point TF107 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 09:19, sampling point TF107 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 09:19, sampling point TF107 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025

Routine (10).