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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.

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

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 21–30 of 630 samples, newest first — collected July 1, 2025 to August 7, 2025. The summary above covers all 630.

17 results from the 10 samples listed here: 11 detected, 6 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 9 sampling points 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 21 to 30 of 630 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 7, 2025 13:40
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
HA-250808-001
Laboratory
MSDH Lab
27.4 ug/l , sample collected Aug 7, 2025 13:40, sampling point SMH Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jul 1, 2025 – Sep 30, 2025
Collected
Aug 7, 2025 14:00
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
TH-250808-002
Laboratory
MSDH Lab
69.2 ug/l , sample collected Aug 7, 2025 14:00, sampling point SMT TTHM 2950 EPA method 524.2 Jul 1, 2025 – Sep 30, 2025
Collected
Aug 7, 2025 13:30
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
TH-250808-001
Laboratory
MSDH Lab
62.8 ug/l , sample collected Aug 7, 2025 13:30, sampling point SMH TTHM 2950 EPA method 524.2 Jul 1, 2025 – Sep 30, 2025
Collected
Jul 2, 2025 07:15
Sampling point
LC026 Location withheld
Sample type
Routine
Lab sample
PB-250708-027
Laboratory
MSDH Lab
0.0501 mg/l , sample collected Jul 2, 2025 07:15, sampling point LC026 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 2, 2025 07:15, sampling point LC026 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Jul 2, 2025 07:00
Sampling point
LC052 Location withheld
Sample type
Routine
Lab sample
PB-250708-028
Laboratory
MSDH Lab
0.0624 mg/l , sample collected Jul 2, 2025 07:00, sampling point LC052 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 2, 2025 07:00, sampling point LC052 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Jul 2, 2025 07:00
Sampling point
LC060 Location withheld
Sample type
Routine
Lab sample
PB-250708-017
Laboratory
MSDH Lab
0.0636 mg/l , sample collected Jul 2, 2025 07:00, sampling point LC060 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.7 ug/l , sample collected Jul 2, 2025 07:00, sampling point LC060 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Jul 1, 2025 10:30
Sampling point
LC004 Location withheld
Sample type
Routine
Lab sample
PB-250708-022
Laboratory
MSDH Lab
0.0538 mg/l , sample collected Jul 1, 2025 10:30, sampling point LC004 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 1, 2025 10:30, sampling point LC004 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Jul 1, 2025 06:30
Sampling point
LC037 Location withheld
Sample type
Routine
Lab sample
PB-250708-020
Laboratory
MSDH Lab
0.0509 mg/l , sample collected Jul 1, 2025 06:30, sampling point LC037 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 1, 2025 06:30, sampling point LC037 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Jul 1, 2025 07:20
Sampling point
LC055 Location withheld
Sample type
Routine
Lab sample
PB-250708-013
Laboratory
MSDH Lab
0.0451 mg/l , sample collected Jul 1, 2025 07:20, sampling point LC055 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 1, 2025 07:20, sampling point LC055 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Jul 1, 2025 04:50
Sampling point
LC017 Location withheld
Sample type
Routine
Lab sample
PB-250708-014
Laboratory
MSDH Lab
0.0802 mg/l , sample collected Jul 1, 2025 04:50, sampling point LC017 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 1, 2025 04:50, sampling point LC017 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025

Routine (10).