Community Water System · PWSID MI0040197

Mason Manor

Serves 630 peopleGroundwaterOwner: PrivateDenver, Colorado

Nothing open right now.

On record since 2016: 7 violations. 4 over the limit · 3 missed or late tests. Most recent began 2023-01-01.

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

4Over the limit

0Treatment lapse

3Missed or late test

0Notice or report

More violations on record than 60% of active water systems in Colorado. 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.

57% over the limit · 443% missed or late test · 3

Across Colorado, 74% of violations are missed or late tests and 6% 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 1 result on file · action level 15 ppb

0 ppb

Every violation on record

2023-01-01Combined Radium (-226 and -228)Monitoring, RegularBack in compliance
2022-04-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/L · limit 5.00 PCI/LBack in compliance
2022-01-01Combined Radium (-226 and -228)MCL, Averagemeasured 7.00 PCI/L · limit 5.00 PCI/LBack in compliance
2021-10-01Combined Radium (-226 and -228)MCL, Averagemeasured 7.00 PCI/LBack in compliance
2021-07-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/LBack in compliance
2019-01-01Combined Radium (-226 and -228)Monitoring, RegularBack in compliance
2016-04-01Revised Total Coliform RuleMONBack in compliance

System details

Population served	630
Service connections	269
Water source	Groundwater
System type	Community Water System
Owner	Private
Status	Active
City	Denver
EPA ZIP on file	80237

Areas served

Ingham County

Reading this record

Mason Manor is a community water system that draws from groundwater and serves about 630 people in Denver, Colorado. 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.