Community Water System · PWSID WI1130237

Marshall Waterworks

Serves 3,862 peopleGroundwaterOwner: Local GovernmentMarshall, Wisconsin

Nothing open right now.

On record since 2014: 5 violations. 3 over the limit · 2 notices or reports. Most recent began 2017-10-01.

For this year's test results, ask the utility for its annual Consumer Confidence Report. Every community system must publish one.

3Over the limit

0Treatment lapse

0Missed or late test

2Notice or report

More violations on record than 87% of active water systems in Wisconsin. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.

60% over the limit · 340% notice or report · 2

Across Wisconsin, 54% of violations are missed or late tests and 5% are water over a limit.

How far over the limit

Each dot is one over-the-limit violation: the measured value divided by the limit it broke, on a log scale. Most legal limits for chemicals are running averages set for a lifetime of drinking, so “just over” and “ten times over” are very different news. Hover a dot for the numbers.

Lead & copper at the tap

Utilities sample taps in homes most likely to have lead pipes, and report the 90th-percentile result: 9 in 10 homes sampled came in at or below this number. Above the red line (the action level) the utility must act. The action level is not a safe level; EPA's health goal for lead is zero. EPA's file does not date these results, so they are shown highest first.

Lead, 90th percentile 3 results on file · action level 15 ppb

2 ppb

1.4 ppb

0.33 ppb

Every violation on record

2017-10-01Combined Radium (-226 and -228)MCL, Averagemeasured 5.78 PCI/L · limit 5.50 PCI/LBack in compliance
2015-03-10Public NoticePN Violation for NPDWR ViolationBack in compliance
2015-03-05Public NoticePN Violation for NPDWR ViolationBack in compliance
2015-01-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.56 PCI/L · limit 5.50 PCI/LBack in compliance
2014-10-01Combined Radium (-226 and -228)MCL, Averagemeasured 5.57 PCI/L · limit 5.50 PCI/LBack in compliance

System details

Population served	3,862
Service connections	1,430
Water source	Groundwater
System type	Community Water System
Owner	Local Government
Status	Active
City	Marshall
EPA ZIP on file	53559-0045

Areas served

Marshall, Dane County

Reading this record

Marshall Waterworks is a community water system that draws from groundwater and serves about 3,862 people in Marshall, Wisconsin. Everything above comes from the EPA's Safe Drinking Water Information System (SDWIS), where states report every violation by every public water system.

Four kinds of violation. Only one is a measurement of the water: over the limit means a test came back above a legal maximum (an MCL). A treatment lapse means a required protective step was not done, such as disinfection, filtration, fixing a defect an inspector found, or filing a lead-pipe inventory. A missed or late test means a required test was skipped or never reported. That is the most common kind, and the most misread: it does not mean the water was bad, and it does not mean the water was fine. Notices and reports covers public notices and the annual Consumer Confidence Report.

Status. “Back in compliance” means the state recorded a return to compliance. “Period ended” means the violation's compliance period is over but no return to compliance was ever filed, which is common in older records. EPA's federal copy lags state records by months, so call the utility for anything current.