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Public water system record

Sherwood Waterworks

Serves Sherwood, Calumet County, WI · 3,114 people served

Federal records show 1 health-based violation and 4 monitoring/reporting issues for Sherwood Waterworks in the last ten years. The most serious issue in this window was a resolved LEAD AND COPPER RULE REVISIONS violation.

  • WI4080271
  • SHERWOOD
  • WI
  • 3,114 served

System profile

Source water Purchased surface water
ZIP 54169
EPA system ID WI4080271

Verify this system on EPA ECHO →

Health-based violations, last 10 years
1
Resolved
1
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
4

Key facts

  • Sherwood Waterworks buys its water from Appleton Waterworks.
  • Most recent formal enforcement: compliance order (no penalty) by Wisconsin, January 2010.
  • Record on file since 1993, with 11 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 1,312 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.

Contaminant Rule family Start date Status Acute
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
 350 Oct 17, 2024 Resolved No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
Haloacetic Acids (HAA5)
Monitoring and reporting
 Oct 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Oct 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Public Notice
OTHER
 Oct 17, 2024 Resolved
Consumer Confidence Rule
OTHER
 Oct 1, 2024 Resolved

Full record since 1993

EPA's records for Sherwood Waterworks go back to 1993. Before October 19, 2016 they list 11 health-based violations (11 resolved) and 21 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 0 4
2000s 11 12
2010 to October 18, 2016 0 5
2020s 1 4

Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began April 2009, Resolved.

Show all 11 health-based violations before October 19, 2016
Contaminant Start date Status
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 199 µg/L, federal limit 80 µg/L (2.5 times the limit)
 Apr 1, 2009 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 196.75 µg/L, federal limit 80 µg/L (2.5 times the limit)
 Jan 1, 2009 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 199.1 µg/L, federal limit 80 µg/L (2.5 times the limit)
 Oct 1, 2008 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 164.1 µg/L, federal limit 80 µg/L (2.1 times the limit)
 Jul 1, 2008 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 135.15 µg/L, federal limit 80 µg/L (1.7 times the limit)
 Apr 1, 2008 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 118.9 µg/L, federal limit 80 µg/L (1.5 times the limit)
 Jan 1, 2008 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 82.4 µg/L, federal limit 80 µg/L (at or just above the limit)
 Oct 1, 2007 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 80.6 µg/L, federal limit 80 µg/L (at or just above the limit)
 Apr 1, 2007 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 88.53 µg/L, federal limit 80 µg/L (1.1 times the limit)
 Jan 1, 2007 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 111.08 µg/L, federal limit 80 µg/L (1.4 times the limit)
 Jul 1, 2006 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 101.9 µg/L, federal limit 80 µg/L (1.3 times the limit)
 Apr 1, 2006 Resolved

Enforcement actions

Wisconsin regulators took 4 formal enforcement actions against Sherwood Waterworks between 2008 and 2010, filed as 15 records in EPA's data. The most recent was a compliance order (no penalty) in January 2010.

Date By Action Violations covered
Jan 12, 2010 Wisconsin Compliance order (no penalty) 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Mar 24, 2009 Wisconsin Compliance order (no penalty) 2 violations (2 health-based): Total Trihalomethanes (TTHMs)
Dec 16, 2008 Wisconsin Compliance order (no penalty) 1 violation (1 health-based): Total Trihalomethanes (TTHMs)
Jun 30, 2008 Wisconsin Compliance order (no penalty) 11 violations (7 health-based): Total Trihalomethanes (TTHMs), Public Notice

What the violations mean

LEAD AND COPPER RULE REVISIONS

1 incident

The system did not complete a treatment step or action that the LEAD AND COPPER RULE REVISIONS requires (a treatment technique violation).

The utility had to notify customers about this violation.

Where the water comes from

Sherwood Waterworks buys its water from Appleton Waterworks. EPA also lists 1 well, all for emergency, seasonal or other part-time use.

Buys water from

Annual water quality report

Sherwood Waterworks 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 Wisconsin.

Certified drinking water labs by state EPA guidance for private wells