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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

MS0610023 , City of Richland

29 of the 61 analytes this system has been tested for have been detected at least once, across 630 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 630 samples on record, detections range from October 20, 2003 to July 22, 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 City of Richland, 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 161 of 161 results Jun 8, 2004 Jul 2, 2025
Lead 1030 Inorganic Chemical 66 of 161 results Jun 8, 2004 Jul 2, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 60 of 60 results Aug 9, 2004 Jun 24, 2026
TTHM 2950 Organic Chemical 58 of 59 results Aug 9, 2004 Mar 18, 2026
Barium 1010 Inorganic Chemical 51 of 51 results Oct 20, 2003 Apr 8, 2025
Fluoride 1025 Inorganic Chemical 51 of 51 results Oct 20, 2003 Apr 8, 2025
Chromium 1020 Inorganic Chemical 35 of 51 results Oct 20, 2003 Apr 8, 2025
Dichloroacetic Acid 2451 Organic Chemical 22 of 22 results Jul 7, 2008 Jun 24, 2026
Trichloroacetic Acid 2452 Organic Chemical 22 of 22 results Jul 7, 2008 Jun 24, 2026
Chloroform 2941 Organic Chemical 22 of 22 results Jun 19, 2007 Mar 18, 2026
Bromodichloromethane 2943 Organic Chemical 22 of 22 results Jun 19, 2007 Mar 18, 2026
Sodium 1052 Inorganic Chemical 18 of 18 results Sep 24, 2019 Jul 22, 2026
Gross Alpha, Incl. Radon & U 4002 Radionuclide 15 of 20 results Mar 13, 2012 Oct 10, 2012
Nickel 1036 Inorganic Chemical 13 of 51 results Mar 27, 2006 Apr 8, 2025
Gross Alpha, Excl. Radon & U 4000 Radionuclide 7 of 8 results Sep 22, 2009 Mar 15, 2010
Combined Radium (-226 & -228) 4010 Radionuclide 7 of 28 results Sep 22, 2009 Mar 15, 2010
Radium-226 4020 Radionuclide 7 of 28 results Sep 22, 2009 Mar 15, 2010
Gross Beta Particle Activity 4100 Radionuclide 7 of 7 results Sep 22, 2009 Mar 15, 2010
Gross Alpha Particle Activity 4109 Radionuclide 7 of 8 results Sep 22, 2009 Mar 15, 2010
Radium-228 4030 Radionuclide 5 of 28 results Sep 22, 2009 Mar 15, 2010
Monobromoacetic Acid 2453 Organic Chemical 5 of 22 results Jun 15, 2009 Dec 14, 2009
Nitrite 1041 Inorganic Chemical 4 of 108 results Jul 31, 2006 Feb 25, 2021
Monochloroacetic Acid 2450 Organic Chemical 4 of 22 results Jul 7, 2008 Jul 11, 2018
Dichloromethane 2964 Organic Chemical 3 of 59 results Aug 23, 2004 Aug 23, 2004
Sulfate 1055 Inorganic Chemical 3 of 3 results Oct 20, 2003 Oct 20, 2003
Selenium 1045 Inorganic Chemical 2 of 51 results Mar 22, 2004 Mar 27, 2006
Xylenes, Total 2955 Organic Chemical 1 of 59 results Sep 7, 2019 Sep 7, 2019
Carbon Tetrachloride 2982 Organic Chemical 1 of 59 results Mar 30, 2004 Mar 30, 2004
Mercury 1035 Inorganic Chemical 1 of 51 results Mar 22, 2004 Mar 22, 2004

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 51–60 of 68 samples, newest first — collected January 28, 2025 to April 8, 2025. The summary above covers all 68.

78 results from the 10 samples listed here: 10 detected, 68 not detected. Across the whole record it is 680 of 3,007. 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 City of Richland, every result from 51 to 60 of 68 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
Apr 8, 2025 08:20
Sampling point
TF105
Sample type
Routine
Lab sample
NI-250408-058
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 8, 2025 08:20, sampling point TF105 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 8, 2025 08:20, sampling point TF105 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 8, 2025 08:20, sampling point TF105 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Apr 8, 2025 09:20
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
NI-250408-061
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 8, 2025 09:20, 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 Apr 8, 2025 09:20, 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 Apr 8, 2025 09:20, sampling point TF103 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Apr 8, 2025 09:00
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
NI-250408-059
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 8, 2025 09:00, sampling point TF102 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 8, 2025 09:00, sampling point TF102 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 8, 2025 09:00, sampling point TF102 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Apr 8, 2025 08:40
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-250408-057
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 8, 2025 08:40, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 8, 2025 08:40, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 8, 2025 08:40, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Mar 25, 2025 09:35
Sampling point
TF105
Sample type
Routine
Lab sample
IN-250326-010
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 09:35, sampling point TF105 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0016 mg/l , sample collected Mar 25, 2025 09:35, sampling point TF105 Barium 1010 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 09:35, sampling point TF105 Cadmium 1015 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 09:35, sampling point TF105 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.254 mg/l , sample collected Mar 25, 2025 09:35, sampling point TF105 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 Mar 25, 2025 09:35, sampling point TF105 Mercury 1035 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0011 mg/l , sample collected Mar 25, 2025 09:35, sampling point TF105 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 09:35, sampling point TF105 Selenium 1045 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 09:35, sampling point TF105 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 Mar 25, 2025 09:35, sampling point TF105 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 Mar 25, 2025 09:35, sampling point TF105 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Mar 25, 2025 10:30
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
IN-250326-009
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 10:30, sampling point TF103 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0026 mg/l , sample collected Mar 25, 2025 10:30, 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 Mar 25, 2025 10:30, 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 Mar 25, 2025 10:30, sampling point TF103 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.242 mg/l , sample collected Mar 25, 2025 10:30, 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 Mar 25, 2025 10:30, 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 Mar 25, 2025 10:30, sampling point TF103 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 10:30, 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 Mar 25, 2025 10:30, 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 Mar 25, 2025 10:30, 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 Mar 25, 2025 10:30, sampling point TF103 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Mar 25, 2025 10:15
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
IN-250326-008
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 10:15, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.001 mg/l , sample collected Mar 25, 2025 10:15, 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 Mar 25, 2025 10:15, 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 Mar 25, 2025 10:15, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.607 mg/l , sample collected Mar 25, 2025 10:15, 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 Mar 25, 2025 10:15, 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 Mar 25, 2025 10:15, sampling point TF102 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 10:15, 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 Mar 25, 2025 10:15, 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 Mar 25, 2025 10:15, 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 Mar 25, 2025 10:15, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Mar 25, 2025 09:55
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-250326-007
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 09:55, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0008 mg/l , sample collected Mar 25, 2025 09:55, sampling point TF101 Barium 1010 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 09:55, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 09:55, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.188 mg/l , sample collected Mar 25, 2025 09:55, sampling point TF101 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 Mar 25, 2025 09:55, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 09:55, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 09:55, sampling point TF101 Selenium 1045 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 25, 2025 09:55, sampling point TF101 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 Mar 25, 2025 09:55, sampling point TF101 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 Mar 25, 2025 09:55, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Mar 11, 2025 11:55
Sampling point
TF107 Treatment Facility TF107
Sample type
Routine
Lab sample
VO-250312-001
Laboratory
MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 11, 2025 11:55, sampling point TF107 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 Mar 11, 2025 11:55, sampling point TF107 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 Mar 11, 2025 11:55, sampling point TF107 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 Mar 11, 2025 11:55, sampling point TF107 Dichloromethane 2964 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 11, 2025 11:55, sampling point TF107 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 Mar 11, 2025 11:55, sampling point TF107 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 Mar 11, 2025 11:55, sampling point TF107 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 Mar 11, 2025 11:55, sampling point TF107 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 Mar 11, 2025 11:55, sampling point TF107 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 Mar 11, 2025 11:55, sampling point TF107 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 Mar 11, 2025 11:55, sampling point TF107 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 Mar 11, 2025 11:55, sampling point TF107 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 Mar 11, 2025 11:55, sampling point TF107 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 Mar 11, 2025 11:55, sampling point TF107 Trichloroethylene 2984 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 11, 2025 11:55, sampling point TF107 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 Mar 11, 2025 11:55, sampling point TF107 Tetrachloroethylene 2987 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 11, 2025 11:55, sampling point TF107 Chlorobenzene 2989 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 11, 2025 11:55, sampling point TF107 Benzene 2990 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 11, 2025 11:55, sampling point TF107 Toluene 2991 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 11, 2025 11:55, sampling point TF107 Ethylbenzene 2992 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Mar 11, 2025 11:55, sampling point TF107 Styrene 2996 EPA method 524.2 Jan 1, 2025 – Dec 31, 2025
Collected
Jan 28, 2025 14:22
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
HA-250129-014
Laboratory
MSDH Lab
50.1 ug/l , sample collected Jan 28, 2025 14:22, sampling point SMT Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2025 – Mar 31, 2025

Routine (10).