Identified coronavirus cases in Oregon continued a steep monthlong decline, according to new state data, although the state’s latest hot spot in Ontario and other parts of eastern Oregon saw limited progress.

The Oregon Health Authority reported 1,477 new confirmed or presumed infections statewide for the week ending Sept. 6. That’s the fifth consecutive week of declines, representing a 35 decrease from the peak of 2,278 cases reported for the week ending Aug. 2.

The Oregonian for months has been monitoring weekly changes in state coronavirus data, reporting by ZIP code the areas with the greatest weekly changes. The analysis has shifted to highlight the areas with the most new cases in relation to the area’s population.

Here’s a look at those ZIP codes.

97914 Ontario

This ZIP code recorded new confirmed or presumed infections of 53 per 10,000 people during the week ending Sept. 6, down slightly from the previous week.

The Malheur County ZIP code along the Idaho border added 102 new cases, raising its total to 996.

The Eastern Oregon area has two active workplace outbreaks with new cases, according to the Oregon Health Authority. Snake River Correctional Institution added 112 confirmed or presumed infections and the Kraft Heinz Company added one.

The Oregon Health Authority did not disclose any new cases in senior care centers.

97818 Boardman

The ZIP code recorded new confirmed or presumed infections totaling 34 per 10,000 people during the week ending Sept. 6, unchanged from a week earlier.

In all, the Morrow County ZIP code added 14 new confirmed or presumed infections, increasing the cumulative total to 316.

Boardman is 30 minutes west of Umatilla and Hermiston, two other areas that have been hard hit by COVID-19 and where residents often commute to nearby jobs.

The Oregon Health Authority reported new cases at seven Boardman businesses with active outbreaks: Threemile Canyon Farms with five new confirmed or presumed infections; Lamb Weston Boardman Pac Center with three; Independent Transport with three; Boardman Foods with three; and Lamb Weston East, Lamb Weston West and Port of Morrow Warehousing with one each.

97761 Warm Springs

This Central Oregon ZIP code recorded new confirmed or presumed infections totaling 33 per 10,000 people during the week ending Sept. 6, more than double from a week earlier.

In total, the Jefferson County ZIP code, which includes the Confederated Tribes of Warm Springs, added 14 new cases. That increased its total to 277.

The Oregon Health Authority did not report any workplace outbreaks in this ZIP code.

97826 Echo

The ZIP code recorded new confirmed or presumed infections totaling 30 per 10,000 people during the week ending Sept. 6, unchanged from a week earlier.

In all, the Umatilla County ZIP code added just three new confirmed or presumed infections, increasing the cumulative total to 23. The total population of this area, near Hermiston, is barely above 1,000.

The Oregon Health Authority did not report any workplace outbreaks in this ZIP code.

97882 Umatilla

The ZIP code recorded new confirmed or presumed infections totaling 28 per 10,000 people during the week ending Sept. 6, down sharply from the previous week.

In all, the Umatilla County ZIP code added 23 new confirmed or presumed infections, increasing the cumulative total to 409.

The Oregon Health Authority reported 12 new case at the Two Rivers Correctional Institution.

97913 Nyssa

This ZIP code recorded new confirmed or presumed infections totaling 22 per 10,000 people during the week ending Sept. 6, down by nearly half from a week earlier.

In all, the Malheur County ZIP code added 11 new cases, raising its total to 191.

The Oregon Health Authority did not report any new workplace cases in this ZIP code.

97071 Woodburn

This ZIP code recorded new confirmed or presumed infections totaling 20 per 10,000 people during the week ending Sept. 6, a drop of not quite half from the previous week.

In all, the Marion County ZIP code added 58 new cases, increasing its cumulative count to 936.

The Oregon Health Authority reported five new cases at Santos Labor Force and one new case at Ezequiel Labor Contracting.

The state also reported 14 new cases and three deaths linked to French Prairie Nursing and Rehab and one new case linked to Country Meadows.