Tap Truth EPA drinking water records, in plain English

County drinking water records

Washington County, OR drinking water systems

21 community water systems serve Washington County, OR, reporting 581,864 people served in all. A system that also serves other counties counts all of its customers here.

5 of them (24%) had at least one health-based violation in the last 10 years. 4 systems still have one unresolved.

7 rely mainly on groundwater and 14 on surface water, counting water bought from other systems.

Their lead service line inventories list 0 lead lines, 0 galvanized lines that must be replaced and 247 lines of unknown material.

8 more systems are placed in Washington County, OR by the county their records name because they have no service area map that lines up with their own records, so they are listed apart and not counted here.

Community water systems
21
People served, sum of each system's own figure
581,864
Systems with a health-based violation, last 10 years
5
Systems with one unresolved
4
Lead service lines in inventories
0

Water systems serving Washington County

21 systems

People served is each system's own figure for its whole service area. Violation counts cover the last 10 years of EPA records.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
Tualatin Valley Water District Aloha, Bethany and 11 more 224,600 Purchased surface water 0 0 0
City of Hillsboro Hillsboro 92,632 Purchased surface water 0 0 0
City of Beaverton Beaverton 88,045 Purchased surface water 0 0 0
City of Tigard Tigard, Bull Mountain and 2 more 62,500 Purchased surface water 0 0 0
City of Tualatin Tualatin 28,106 Purchased surface water 0 0 0
City of Forest Grove Forest Grove and land outside it 26,838 Surface water 0 0 0
City of Sherwood Sherwood 19,885 Purchased surface water 0 0 0
City of Cornelius Cornelius 14,490 Purchased surface water 0 0 0
West Slope Water District West Slope and Raleigh Hills 11,000 Purchased surface water 1 0 0
Raleigh Water District Raleigh Hills 4,500 Purchased surface water 0 0 0
North Plains Water Department North Plains 3,663 Purchased surface water 0 0 0
Banks Water Department Banks 2,070 Surface water 1 0 0
Hillsboro-Cherry Grove Dilley and Cherry Grove and land outside them 1,628 Surface water 0 0 0
City of Gaston Gaston 625 Purchased surface water 0 0 0
Star Satellite Improv Dist Outside cities and towns 400 Groundwater 0 0 0
Westview Mobile Estates Outside cities and towns 250 Groundwater 0 1 0
South Hills Water System Outside cities and towns 250 Groundwater 0 0 0
Laurelwood Water Users Outside cities and towns 200 Groundwater 4 7 0
Wolsborn Farms Water District Outside cities and towns 90 Groundwater 0 4 0
Laurel Acres Water Co Inc Dilley 50 Groundwater 3 0 0
Crown Mobile Home Park Outside cities and towns 42 Groundwater 1 1 0

Systems placed by county record in Washington County

8 systems

EPA has no service area map for some of these systems, and the maps it has for the others do not line up with their own records. They are placed by the county their records name (the counties EPA lists them serving, or the county coded in their IDs where EPA lists none), and without a map they are not counted in the figures above.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
La Water Co-Op County on record 2,500 Purchased surface water 0 0 0
Fir Grove Homeowners Assn County on record 450 Purchased surface water 0 0 0
Timber Water Association County on record 180 Surface water 2 1 0
Parrett Mountain View Estates County on record 155 Groundwater 0 0 0
West Laurel Acres Water Co County on record 65 Groundwater 1 5 No inventory
Rainbow Ends Water System County on record 50 Groundwater 0 0 0
Roth Development County on record 27 Purchased surface water 0 0 0
Joint Water Commission County on record Not reported Surface water 0 0 No inventory

Cities and towns in Washington County

27 places

Back to Oregon

Counties come from the counties EPA lists each system serving, matched to 2024 Census counties; where EPA lists none, from the county coded in the system's ID, its service area map, or its mailing address. A county holding at least a fifth of a system's service area map is added when at least a fifth of that map lies in those counties. Towns are the ones EPA lists and the Census places such a map covers, always inside those counties. In New England, where EPA's town names a whole Town, it is not matched to the village of the same name. A system is not listed in a county holding less than a fifth of its map, or in a county or town its map reaches when the map lies mostly outside the counties EPA lists, so a page can leave out a system that serves part of the area. Methodology and limitations