| 1 | 08WES06... Site Code: 08WES0629Maple Leaf CreekThornton Creek SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Ambi...8/28/2025
Ambient Monitoring
King County - DNRP | 18 | 2 | 1 | 1 | 4 | 5 | 3 | 1 | 75.4% | 1.0% | 66.8% | 500 | 4.1 | 0.0 | 1.4 | 0.0 | 0.0 | 0.0 | 1.2 | 1.4 | 0.0 | 0.0 | 0.0 | Details |
| 2 | 95T, Thor...Site Code: 95TThornton CreekThornton Creek SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2023, Proje...8/30/2023
Project Evaluation
City of Seattle | 13 | 2 | 0 | 1 | 3 | 6 | 3 | 0 | 96.6% | 0.0% | 1.6% | 500 | 12.3 | 0.0 | 1.4 | 0.0 | 0.0 | 0.0 | 1.2 | 0.0 | 0.0 | 0.0 | 9.6 | Details |
| 3 | KNKC, Th...Site Code: KNKCThornton CreekThornton Creek SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Proje...8/5/2025
Project Evaluation
City of Seattle | 21 | 1 | 2 | 2 | 5 | 6 | 3 | 0 | 64.9% | 2.2% | 38.8% | 498 | 6.6 | 0.0 | 0.0 | 1.4 | 1.2 | 0.0 | 1.2 | 0.0 | 1.1 | 0.6 | 1.0 | Details |
| 4 | KNKT_D, ...Site Code: KNKT_DThornton CreekThornton Creek SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Proje...8/5/2025
Project Evaluation
City of Seattle | 20 | 1 | 2 | 1 | 4 | 4 | 5 | 0 | 73.4% | 2.8% | 68.6% | 500 | 6.1 | 0.0 | 0.0 | 1.4 | 0.0 | 0.0 | 3.8 | 0.0 | 0.0 | 0.9 | 0.0 | Details |
| 5 | KNKT_U, ...Site Code: KNKT_UThornton CreekThornton Creek SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Proje...8/5/2025
Project Evaluation
City of Seattle | 22 | 1 | 2 | 2 | 5 | 7 | 3 | 0 | 68.6% | 1.8% | 45.2% | 500 | 4.4 | 0.0 | 0.0 | 1.4 | 1.2 | 0.0 | 1.2 | 0.0 | 0.1 | 0.4 | 0.0 | Details |
| 6 | KNKT-U, ...Site Code: KNKT-UThornton CreekThornton Creek SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2022, Statu...8/30/2022
Status & Trends
City of Seattle | 22 | 1 | 1 | 3 | 5 | 7 | 4 | 0 | 69.4% | 1.2% | 48.2% | 500 | 5.1 | 0.0 | 0.0 | 0.0 | 2.5 | 0.0 | 2.5 | 0.0 | 0.0 | 0.1 | 0.0 | Details |
| 7 | LCPFP_1, ...Site Code: LCPFP_1Thornton CreekThornton Creek SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Proje...8/5/2025
Project Evaluation
City of Seattle | 22 | 1 | 2 | 3 | 6 | 8 | 4 | 0 | 70.0% | 1.0% | 39.8% | 500 | 7.8 | 0.0 | 0.0 | 1.4 | 2.5 | 0.6 | 2.5 | 0.0 | 0.0 | 0.0 | 0.7 | Details |
| 8 | LCPFP_2, ...Site Code: LCPFP_2Thornton CreekThornton Creek SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Proje...8/5/2025
Project Evaluation
City of Seattle | 23 | 1 | 2 | 5 | 8 | 9 | 5 | 0 | 70.0% | 2.2% | 54.8% | 500 | 12.0 | 0.0 | 0.0 | 1.4 | 5.0 | 1.2 | 3.8 | 0.0 | 0.0 | 0.6 | 0.0 | Details |
| 9 | NFCC, Th...Site Code: NFCCThornton CreekThornton Creek SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Proje...8/5/2025
Project Evaluation
City of Seattle | 24 | 1 | 2 | 3 | 6 | 8 | 2 | 0 | 53.4% | 4.0% | 36.4% | 500 | 11.8 | 0.0 | 0.0 | 1.4 | 2.5 | 0.6 | 0.0 | 0.0 | 4.2 | 1.5 | 1.5 | Details |
| 10 | NFCT, Th...Site Code: NFCTThornton CreekThornton Creek SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2023, Proje...8/28/2023
Project Evaluation
City of Seattle | 35 | 1 | 2 | 5 | 8 | 13 | 9 | 0 | 49.4% | 10.0% | 48.8% | 500 | 31.3 | 2.8 | 0.0 | 1.4 | 5.0 | 3.5 | 8.8 | 0.0 | 5.3 | 4.5 | 0.0 | Details |
| 11 | SFCC, Th...Site Code: SFCCThornton CreekThornton Creek SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Proje...8/5/2025
Project Evaluation
City of Seattle | 23 | 1 | 1 | 4 | 6 | 9 | 4 | 0 | 61.8% | 2.0% | 50.0% | 500 | 9.9 | 0.0 | 0.0 | 0.0 | 3.8 | 1.2 | 2.5 | 0.0 | 1.9 | 0.5 | 0.0 | Details |
| 12 | SFCT, Th...Site Code: SFCTThornton CreekThornton Creek SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Proje...8/5/2025
Project Evaluation
City of Seattle | 29 | 1 | 2 | 3 | 6 | 10 | 4 | 0 | 58.2% | 2.6% | 33.8% | 500 | 14.7 | 0.7 | 0.0 | 1.4 | 2.5 | 1.8 | 2.5 | 0.0 | 2.9 | 0.8 | 2.1 | Details |
| 13 | TCA001, ...Site Code: TCA001Thornton CreekThornton Creek SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2024, Sno-...9/16/2024
Sno-King Watershed Council benthic macroinvertebrate analysis of urban & suburban streams in King and Snohomish Counties
Sno-King Watershed Council | 20 | 1 | 1 | 2 | 4 | 8 | 5 | 0 | 66.0% | 1.2% | 29.0% | 500 | 9.8 | 0.0 | 0.0 | 0.0 | 1.2 | 0.6 | 3.8 | 0.0 | 0.8 | 0.1 | 3.3 | Details |
| 14 | TMMA119...Site Code: TMMA1199Thornton CreekThornton Creek SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Statu...8/6/2025
Status & Trends
City of Seattle | 27 | 1 | 2 | 4 | 7 | 10 | 3 | 0 | 64.2% | 2.0% | 42.0% | 500 | 10.2 | 0.0 | 0.0 | 1.4 | 3.8 | 1.8 | 1.2 | 0.0 | 1.3 | 0.5 | 0.2 | Details |
| 15 | TMMA316...Site Code: TMMA3168Thornton CreekThornton Creek SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Statu...8/5/2025
Status & Trends
City of Seattle | 15 | 0 | 0 | 1 | 1 | 3 | 3 | 0 | 95.0% | 0.6% | 1.4% | 500 | 10.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.2 | 0.0 | 0.0 | 0.0 | 9.7 | Details |
| 16 | TMMA875...Site Code: TMMA8751Thornton CreekThornton Creek SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Statu...8/6/2025
Status & Trends
City of Seattle | 32 | 1 | 2 | 3 | 6 | 8 | 7 | 0 | 86.6% | 9.6% | 81.8% | 500 | 16.8 | 1.7 | 0.0 | 1.4 | 2.5 | 0.6 | 6.2 | 0.0 | 0.0 | 4.3 | 0.0 | Details |
| 17 | TNMA060...Site Code: TNMA0609Thornton CreekThornton Creek SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Statu...8/5/2025
Status & Trends
City of Seattle | 26 | 1 | 2 | 2 | 5 | 9 | 4 | 0 | 58.6% | 1.4% | 38.6% | 500 | 10.4 | 0.0 | 0.0 | 1.4 | 1.2 | 1.2 | 2.5 | 0.0 | 2.8 | 0.2 | 1.0 | Details |
| 18 | TNMA767...Site Code: TNMA7673Thornton CreekThornton Creek SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Statu...8/5/2025
Status & Trends
City of Seattle | 28 | 1 | 2 | 4 | 7 | 10 | 6 | 0 | 54.2% | 2.2% | 49.2% | 498 | 16.9 | 0.3 | 0.0 | 1.4 | 3.8 | 1.8 | 5.0 | 0.0 | 4.0 | 0.6 | 0.0 | Details |
| 19 | TSMA661...Site Code: TSMA6612Thornton CreekThornton Creek SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Statu...8/28/2025
Status & Trends
City of Seattle | 19 | 1 | 2 | 0 | 3 | 3 | 2 | 0 | 84.2% | 0.8% | 74.2% | 500 | 1.4 | 0.0 | 0.0 | 1.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | Details |
| 20 | TSMA777...Site Code: TSMA7774Thornton CreekThornton Creek SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Statu...8/6/2025
Status & Trends
City of Seattle | 27 | 1 | 2 | 4 | 7 | 9 | 3 | 0 | 45.6% | 2.0% | 25.2% | 500 | 18.6 | 0.0 | 0.0 | 1.4 | 3.8 | 1.2 | 1.2 | 0.0 | 6.3 | 0.5 | 4.1 | Details |