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Public water system record

Rosario

Serves an area of San Juan County, WA · 1,031 people served

Federal records show no health-based violations and no monitoring or reporting issues for Rosario in the last ten years.

  • WA5374270
  • TACOMA
  • WA
  • 1,031 served

System profile

Source water Surface water
ZIP 98444
EPA system ID WA5374270

Verify this system on EPA ECHO →

Health-based violations, last 10 years
0
Resolved
0
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
0

Key facts

  • Rosario draws water from 1 surface water intake.
  • Most recent formal enforcement: administrative penalty by Washington, May 2000.
  • Record on file since 1979, with 7 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 222 unknown out of 297 service lines.

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

None since October 2016, and no monitoring or reporting violations either.

Full record since 1979

EPA's records for Rosario go back to 1979. Before October 19, 2016 they list 7 health-based violations (1 resolved, 6 archived by EPA without a recorded fix) and 43 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1970s 0 9
1990s 3 11
2000s 3 20
2010 to October 18, 2016 1 3

Most recent health-based violation before October 19, 2016: Surface Water Treatment Rule, began June 2010, Resolved.

Show all 7 health-based violations before October 19, 2016
Contaminant Start date Status
Surface Water Treatment Rule
Treatment technique failure
 Jun 1, 2010 Resolved
Surface Water Treatment Rule
Treatment technique failure
 Oct 1, 2008 Archived
Surface Water Treatment Rule
Treatment technique failure
 Jun 1, 2005 Archived
Surface Water Treatment Rule
Treatment technique failure
 Jun 1, 2000 Archived
Surface Water Treatment Rule
Treatment technique failure
 Aug 1, 1999 Archived
Surface Water Treatment Rule
Treatment technique failure
 Jul 1, 1999 Archived
Surface Water Treatment Rule
Treatment technique failure
 Jan 1, 1999 Archived

Enforcement actions

Washington regulators took 1 formal enforcement action against Rosario in 2000. The most recent was an administrative penalty in May 2000.

Date By Action Violations covered
May 30, 2000 Washington Administrative penalty 2 violations (2 health-based): Surface Water Treatment Rule

Where the water comes from

Rosario draws water from 1 surface water intake. 1 other community water system buys water from Rosario.

Community systems that buy water from it

Annual water quality report

Rosario must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Washington.

Certified drinking water labs by state EPA guidance for private wells