| - Aluminum, fltd, ICP-MS - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01106, MCode: PLM10 |
| Analysis dates: 10/01/19 through 03/31/26 |
| Open Data Set |
| - Aluminum, fltd, ICP-MS - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01106, MCode: PLM10 |
| Analysis dates: 10/01/19 through 03/31/26 |
| Open Data Set |
| False Positive Rate for Aluminum, fltd, ICP-MS |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Aluminum, fltd, ICP-MS | 01106PLM10 | 2019 | 1 | 0 | 0% |
| 2020 | 48 | 0 | 0% | ||
| 2021 | 48 | 0 | 0% | ||
| 2022 | 48 | 0 | 0% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 8 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Aluminum, unfltd, ICP-MS, recov - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01105, MCode: PLM77 |
| Analysis dates: 10/01/19 through 02/09/26 |
| Open Data Set |
| False Positive Rate for Aluminum, unfltd, ICP-MS, recov |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Aluminum, unfltd, ICP-MS, recov | 01105PLM77 | 2019 | 3 | 0 | 0% |
| 2020 | 45 | 0 | 0% | ||
| 2021 | 48 | 2 | 4% | ||
| 2022 | 48 | 2 | 4% | ||
| 2023 | 48 | 2 | 4% | ||
| 2024 | 48 | 1 | 2% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 8 | 1 | 13% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Antimony, fltd, ICP-MS - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01095, MCode: PLM43 |
| Analysis dates: 10/01/19 through 03/31/26 |
| Open Data Set |
| False Positive Rate for Antimony, fltd, ICP-MS |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Antimony, fltd, ICP-MS | 01095PLM43 | 2019 | 1 | 0 | 0% |
| 2020 | 48 | 0 | 0% | ||
| 2021 | 48 | 0 | 0% | ||
| 2022 | 48 | 0 | 0% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 8 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Antimony, unfltd, ICP-MS, recov - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01097, MCode: PLM78 |
| Analysis dates: 10/01/19 through 02/11/26 |
| Open Data Set |
| False Positive Rate for Antimony, unfltd, ICP-MS, recov |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Antimony, unfltd, ICP-MS, recov | 01097PLM78 | 2019 | 3 | 0 | 0% |
| 2020 | 45 | 0 | 0% | ||
| 2021 | 48 | 0 | 0% | ||
| 2022 | 48 | 0 | 0% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 8 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Arsenic, fltd, cICP-MS - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01000, MCode: PLM10 |
| Analysis dates: 10/01/19 through 03/31/26 |
| Open Data Set |
| False Positive Rate for Arsenic, fltd, cICP-MS |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Arsenic, fltd, cICP-MS | 01000PLM10 | 2019 | 1 | 0 | 0% |
| 2020 | 48 | 0 | 0% | ||
| 2021 | 48 | 0 | 0% | ||
| 2022 | 48 | 0 | 0% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 1 | 2% | ||
| 2026 | 8 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Arsenic, unfltd, cICP-MS, recov - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01002, MCode: PLM77 |
| Analysis dates: 10/01/19 through 02/09/26 |
| Open Data Set |
| False Positive Rate for Arsenic, unfltd, cICP-MS, recov |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Arsenic, unfltd, cICP-MS, recov | 01002PLM77 | 2019 | 3 | 0 | 0% |
| 2020 | 45 | 0 | 0% | ||
| 2021 | 48 | 0 | 0% | ||
| 2022 | 48 | 0 | 0% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 8 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Barium, fltd, ICP-MS - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01005, MCode: PLM43 |
| Analysis dates: 10/01/19 through 03/31/26 |
| Open Data Set |
| False Positive Rate for Barium, fltd, ICP-MS |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Barium, fltd, ICP-MS | 01005PLM43 | 2019 | 1 | 0 | 0% |
| 2020 | 48 | 1 | 2% | ||
| 2021 | 48 | 1 | 2% | ||
| 2022 | 48 | 0 | 0% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 1 | 2% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 8 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Barium, fltd, ICP-OES - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01005, MCode: PLA11 |
| Analysis dates: 10/03/19 through 02/24/26 |
| Open Data Set |
| False Positive Rate for Barium, fltd, ICP-OES |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Barium, fltd, ICP-OES | 01005PLA11 | 2019 | 6 | 0 | 0% |
| 2020 | 48 | 1 | 2% | ||
| 2021 | 48 | 0 | 0% | ||
| 2022 | 48 | 0 | 0% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 9 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Barium, unfltd, ICP-MS, recov - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01007, MCode: PLM78 |
| Analysis dates: 10/01/19 through 02/09/26 |
| Open Data Set |
| False Positive Rate for Barium, unfltd, ICP-MS, recov |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Barium, unfltd, ICP-MS, recov | 01007PLM78 | 2019 | 3 | 0 | 0% |
| 2020 | 45 | 0 | 0% | ||
| 2021 | 48 | 0 | 0% | ||
| 2022 | 48 | 0 | 0% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 8 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Barium, unfltd, ICP-OES, recov - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01007, MCode: PLO07 |
| Analysis dates: 10/25/19 through 02/17/26 |
| Open Data Set |
| False Positive Rate for Barium, unfltd, ICP-OES, recov |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Barium, unfltd, ICP-OES, recov | 01007PLO07 | 2019 | 4 | 0 | 0% |
| 2020 | 45 | 0 | 0% | ||
| 2021 | 49 | 0 | 0% | ||
| 2022 | 48 | 0 | 0% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 9 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Beryllium, fltd, ICP-MS - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01010, MCode: PLM43 |
| Analysis dates: 10/01/19 through 03/31/26 |
| Open Data Set |
| False Positive Rate for Beryllium, fltd, ICP-MS |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Beryllium, fltd, ICP-MS | 01010PLM43 | 2019 | 1 | 0 | 0% |
| 2020 | 48 | 0 | 0% | ||
| 2021 | 48 | 1 | 2% | ||
| 2022 | 48 | 0 | 0% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 8 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Beryllium, unfltd, ICP-MS, recov - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01012, MCode: PLM78 |
| Analysis dates: 10/01/19 through 02/09/26 |
| Open Data Set |
| False Positive Rate for Beryllium, unfltd, ICP-MS, recov |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Beryllium, unfltd, ICP-MS, recov | 01012PLM78 | 2019 | 3 | 0 | 0% |
| 2020 | 45 | 0 | 0% | ||
| 2021 | 48 | 0 | 0% | ||
| 2022 | 48 | 0 | 0% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 8 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Boron, fltd, ICP-MS - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01020, MCode: PLM40 |
| Analysis dates: 10/01/19 through 03/31/26 |
| Open Data Set |
| False Positive Rate for Boron, fltd, ICP-MS |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Boron, fltd, ICP-MS | 01020PLM40 | 2019 | 1 | 0 | 0% |
| 2020 | 48 | 0 | 0% | ||
| 2021 | 48 | 0 | 0% | ||
| 2022 | 48 | 0 | 0% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 8 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Boron, fltd, ICP-OES - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01020, MCode: PLA13 |
| Analysis dates: 10/03/19 through 02/24/26 |
| Open Data Set |
| False Positive Rate for Boron, fltd, ICP-OES |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Boron, fltd, ICP-OES | 01020PLA13 | 2019 | 6 | 0 | 0% |
| 2020 | 48 | 0 | 0% | ||
| 2021 | 48 | 0 | 0% | ||
| 2022 | 48 | 0 | 0% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 9 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Boron, unfltd, ICP-MS, recov - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01022, MCode: PLM78 |
| Analysis dates: 10/01/19 through 02/09/26 |
| Open Data Set |
| False Positive Rate for Boron, unfltd, ICP-MS, recov |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Boron, unfltd, ICP-MS, recov | 01022PLM78 | 2019 | 3 | 0 | 0% |
| 2020 | 45 | 0 | 0% | ||
| 2021 | 48 | 0 | 0% | ||
| 2022 | 48 | 0 | 0% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 8 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Boron, unfltd, ICP-OES, recov - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01022, MCode: PLO07 |
| Analysis dates: 10/25/19 through 02/17/26 |
| Open Data Set |
| False Positive Rate for Boron, unfltd, ICP-OES, recov |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Boron, unfltd, ICP-OES, recov | 01022PLO07 | 2019 | 4 | 0 | 0% |
| 2020 | 45 | 0 | 0% | ||
| 2021 | 49 | 0 | 0% | ||
| 2022 | 48 | 3 | 6% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 9 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Cadmium, fltd, ICP-MS - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01025, MCode: PLM43 |
| Analysis dates: 10/01/19 through 03/31/26 |
| Open Data Set |
| False Positive Rate for Cadmium, fltd, ICP-MS |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Cadmium, fltd, ICP-MS | 01025PLM43 | 2019 | 1 | 0 | 0% |
| 2020 | 48 | 0 | 0% | ||
| 2021 | 48 | 0 | 0% | ||
| 2022 | 48 | 0 | 0% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 8 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Cadmium, unfltd, ICP-MS, recov - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01027, MCode: PLM78 |
| Analysis dates: 10/01/19 through 02/09/26 |
| Open Data Set |
| False Positive Rate for Cadmium, unfltd, ICP-MS, recov |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Cadmium, unfltd, ICP-MS, recov | 01027PLM78 | 2019 | 3 | 0 | 0% |
| 2020 | 45 | 0 | 0% | ||
| 2021 | 48 | 0 | 0% | ||
| 2022 | 48 | 0 | 0% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 8 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Chromium, fltd, ICP-OES - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01030, MCode: PLA11 |
| Analysis dates: 10/03/19 through 02/24/26 |
| Open Data Set |
| False Positive Rate for Chromium, fltd, ICP-OES |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Chromium, fltd, ICP-OES | 01030PLA11 | 2019 | 6 | 0 | 0% |
| 2020 | 48 | 0 | 0% | ||
| 2021 | 48 | 0 | 0% | ||
| 2022 | 48 | 0 | 0% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 9 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Chromium, fltd, cICP-MS - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01030, MCode: PLM10 |
| Analysis dates: 10/01/19 through 03/31/26 |
| Open Data Set |
| False Positive Rate for Chromium, fltd, cICP-MS |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Chromium, fltd, cICP-MS | 01030PLM10 | 2019 | 1 | 0 | 0% |
| 2020 | 48 | 0 | 0% | ||
| 2021 | 48 | 0 | 0% | ||
| 2022 | 48 | 0 | 0% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 8 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Chromium, unfltd, ICP-OES, recov - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01034, MCode: PLO07 |
| Analysis dates: 10/25/19 through 02/17/26 |
| Open Data Set |
| False Positive Rate for Chromium, unfltd, ICP-OES, recov |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Chromium, unfltd, ICP-OES, recov | 01034PLO07 | 2019 | 4 | 0 | 0% |
| 2020 | 45 | 0 | 0% | ||
| 2021 | 49 | 0 | 0% | ||
| 2022 | 48 | 2 | 4% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 1 | 2% | ||
| 2026 | 9 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Chromium, unfltd, cICP-MS, recov - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01034, MCode: PLM77 |
| Analysis dates: 10/01/19 through 02/09/26 |
| Open Data Set |
| False Positive Rate for Chromium, unfltd, cICP-MS, recov |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Chromium, unfltd, cICP-MS, recov | 01034PLM77 | 2019 | 3 | 0 | 0% |
| 2020 | 45 | 0 | 0% | ||
| 2021 | 48 | 1 | 2% | ||
| 2022 | 48 | 0 | 0% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 8 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Cobalt, fltd, cICP-MS - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01035, MCode: PLM10 |
| Analysis dates: 10/01/19 through 03/31/26 |
| Open Data Set |
| False Positive Rate for Cobalt, fltd, cICP-MS |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Cobalt, fltd, cICP-MS | 01035PLM10 | 2019 | 1 | 0 | 0% |
| 2020 | 48 | 0 | 0% | ||
| 2021 | 48 | 0 | 0% | ||
| 2022 | 48 | 0 | 0% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 8 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Cobalt, unfltd, cICP-MS, recov - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01037, MCode: PLM77 |
| Analysis dates: 10/01/19 through 02/09/26 |
| Open Data Set |
| False Positive Rate for Cobalt, unfltd, cICP-MS, recov |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Cobalt, unfltd, cICP-MS, recov | 01037PLM77 | 2019 | 3 | 0 | 0% |
| 2020 | 45 | 0 | 0% | ||
| 2021 | 48 | 0 | 0% | ||
| 2022 | 48 | 0 | 0% | ||
| 2023 | 48 | 1 | 2% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 8 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Copper, fltd, ICP-OES - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01040, MCode: PLA11 |
| Analysis dates: 10/03/19 through 02/24/26 |
| Open Data Set |
| False Positive Rate for Copper, fltd, ICP-OES |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Copper, fltd, ICP-OES | 01040PLA11 | 2019 | 6 | 0 | 0% |
| 2020 | 48 | 1 | 2% | ||
| 2021 | 48 | 0 | 0% | ||
| 2022 | 48 | 1 | 2% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 9 | 0 | 0% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Copper, fltd, cICP-MS - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01040, MCode: PLM10 |
| Analysis dates: 10/01/19 through 03/31/26 |
| Open Data Set |
| False Positive Rate for Copper, fltd, cICP-MS |
| parmdesc | Pcode Mcode |
Water Year | # of Samples |
# of False Pos. |
*False Positive Rate |
|---|---|---|---|---|---|
| Copper, fltd, cICP-MS | 01040PLM10 | 2019 | 1 | 0 | 0% |
| 2020 | 48 | 2 | 4% | ||
| 2021 | 48 | 2 | 4% | ||
| 2022 | 48 | 0 | 0% | ||
| 2023 | 48 | 0 | 0% | ||
| 2024 | 48 | 0 | 0% | ||
| 2025 | 47 | 0 | 0% | ||
| 2026 | 8 | 1 | 13% | ||
| *Highlighted if false positive rate > 5 % | |||||
| Hover over any data point for detailed info. |
| Chart generated 04/09/2026 |
| Charts and data secured from this U.S. Geological Survey (USGS) web page (identified as IBSP) have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. |
| - Copper, unfltd, ICP-OES, recov - |
| Blind Blank Results |
| Lab: NWQL, PCode: 01042, MCode: PLO07 |
| Analysis dates: 10/25/19 through 02/17/26 |
| Open Data Set |