| 1 | 08CED28... Site Code: 08CED2898Cedar River - Lower tributary (0311)Lower Cedar River SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Ambi...7/29/2025
Ambient Monitoring
King County - DNRP | 53 | 4 | 5 | 3 | 12 | 9 | 6 | 1 | 41.6% | 19.0% | 17.8% | 500 | 51.3 | 9.0 | 4.3 | 5.7 | 2.5 | 1.2 | 5.0 | 1.4 | 7.4 | 9.0 | 5.9 | Details |
| 2 | 08CED49...Site Code: 08CED4975Hotel Creek (0342)Lower Cedar River SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2022, Ambi...7/21/2022
Ambient Monitoring
King County - DNRP | 41 | 8 | 6 | 5 | 19 | 19 | 7 | 6 | 30.9% | 11.0% | 7.0% | 473 | 72.2 | 4.8 | 10.0 | 7.1 | 5.0 | 7.1 | 6.2 | 8.6 | 10.0 | 5.0 | 8.4 | Details |
| 3 | 08CED27...Site Code: 08CED2711Madsen CreekLower Cedar River SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Ambi...8/21/2025
Ambient Monitoring
King County - DNRP | 34 | 2 | 5 | 4 | 11 | 13 | 5 | 0 | 43.0% | 9.4% | 6.2% | 500 | 40.4 | 2.4 | 1.4 | 5.7 | 3.8 | 3.5 | 3.8 | 0.0 | 7.0 | 4.2 | 8.6 | Details |
| 4 | 08CED_b...Site Code: 08CED_bug3Maplewood CreekLower Cedar River SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Integr...9/16/2025
Integrated Streams Program
King County - DNRP | 35 | 4 | 6 | 5 | 15 | 12 | 7 | 2 | 57.0% | 13.8% | 13.6% | 500 | 47.7 | 2.8 | 4.3 | 7.1 | 5.0 | 2.9 | 6.2 | 2.9 | 3.2 | 6.4 | 6.8 | Details |
| 5 | 08CED24...Site Code: 08CED2433Maplewood CreekLower Cedar River SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Ambi...10/2/2025
Ambient Monitoring
King County - DNRP | 41 | 6 | 5 | 5 | 16 | 15 | 8 | 2 | 63.0% | 4.8% | 2.8% | 500 | 50.6 | 4.8 | 7.1 | 5.7 | 5.0 | 4.7 | 7.5 | 2.9 | 1.6 | 1.9 | 9.3 | Details |
| 6 | 08CED25...Site Code: 08CED2518Molasses CreekLower Cedar River SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Ambi...7/28/2025
Ambient Monitoring
King County - DNRP | 39 | 2 | 5 | 3 | 10 | 13 | 7 | 0 | 42.2% | 18.8% | 2.0% | 500 | 49.2 | 4.1 | 1.4 | 5.7 | 2.5 | 3.5 | 6.2 | 0.0 | 7.2 | 8.9 | 9.5 | Details |
| 7 | 08CED41...Site Code: 08CED4192Rock Creek (Lower Cedar)Lower Cedar River SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Ambi...7/23/2025
Ambient Monitoring
King County - DNRP | 64 | 8 | 11 | 8 | 27 | 29 | 9 | 7 | 47.8% | 6.6% | 0.6% | 500 | 85.9 | 10.0 | 10.0 | 10.0 | 8.8 | 10.0 | 8.8 | 10.0 | 5.7 | 2.8 | 9.9 | Details |
| 8 | 31I, Taylor ...Site Code: 31ITaylor Creek/Jem Creek (Lower Cedar)Lower Cedar River SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2022, Regul...10/5/2022
Regulatory Effectiveness
King County - DNRP | 41 | 8 | 8 | 9 | 25 | 24 | 8 | 6 | 37.4% | 13.4% | 12.6% | 500 | 89.3 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | 7.5 | 8.6 | 10.0 | 6.2 | 7.1 | Details |
| 9 | 08CED_b...Site Code: 08CED_bug1Webster Creek - Upper (0341)Lower Cedar River SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2024, Ambi...8/14/2024
Ambient Monitoring
King County - DNRP | 53 | 6 | 10 | 8 | 24 | 25 | 12 | 11 | 60.6% | 10.4% | 0.6% | 500 | 81.7 | 9.0 | 7.1 | 10.0 | 8.8 | 10.0 | 10.0 | 10.0 | 2.3 | 4.7 | 9.9 | Details |
| 10 | 08CED50...Site Code: 08CED5046Webster Creek - Upper (0341)Lower Cedar River SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2025, Ambi...8/7/2025
Ambient Monitoring
King County - DNRP | 62 | 9 | 11 | 11 | 31 | 30 | 14 | 14 | 41.0% | 16.8% | 0.8% | 500 | 95.3 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | 7.6 | 7.9 | 9.8 | Details |
| 11 | 31Q, Web...Site Code: 31QWebster Creek - Upper (0341)Lower Cedar River SubbasinCedar River / Lake Washington BasinWRIA 8 - Cedar-Sammamish | 2022, Regul...10/5/2022
Regulatory Effectiveness
King County - DNRP | 41 | 8 | 9 | 10 | 27 | 27 | 9 | 8 | 53.4% | 10.6% | 0.6% | 500 | 90.9 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | 8.8 | 10.0 | 7.5 | 4.8 | 9.9 | Details |