# Washington Regular Gasoline · Z-Score Stress Index

- Series code: `retail.state_wa.gasoline_regular.weekly.zsi`
- Units: σ · frequency: weekly
- Latest: **1.77 σ** (2026-09-28)
- History: 2003-05-26 to 2026-09-28, 1219 observations
- Change over 1 week: -0.69 (-28.2%)
- Change over 1 month: -0.36 (-16.8%)
- Change over 1 year: +1.16 (+190.0%)
- Change over 5 years: -1.84 (-51.1%)
- 52-week range: 0.10 (2026-01-19) – 2.84 (2026-09-07)
- Latest value is higher than 75% of the full history

## Recent observations

| Date | Value |
|---|---|
| 2026-09-28 | 1.77 |
| 2026-09-21 | 2.46 |
| 2026-09-14 | 2.78 |
| 2026-09-07 | 2.84 |
| 2026-08-31 | 2.31 |
| 2026-08-24 | 2.13 |
| 2026-08-17 | 1.88 |
| 2026-08-10 | 1.68 |
| 2026-08-03 | 1.61 |
| 2026-07-27 | 1.46 |
| 2026-07-20 | 1.13 |
| 2026-07-13 | 0.89 |

Source: Calculated by NewTide from EIA source data. Derived from public-domain EIA data.
Page: https://thinkingonenergy.com/data/retail.state_wa.gasoline_regular.weekly.zsi/