Community Water System · PWSID MA4350003

Mount St Marys Abbey

Serves 60 peopleGroundwaterOwner: PrivateWrentham, Massachusetts
Nothing open that measures the water, but 24 open testing or paperwork violations.

A missed test is not evidence of bad water. It also is not evidence of good water: for that period nobody checked.

On record since 2007: 47 violations. 22 over the limit · 25 notices or reports. Most recent began 2024-10-01.

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

22Over the limit
0Treatment lapse
0Missed or late test
25Notice or report24 open

More violations on record than 98% of active water systems in Massachusetts. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

20052007 · Notice or report: 120102011 · Notice or report: 32011 · Notice or report: 32011 · Notice or report: 32012 · Notice or report: 22012 · Notice or report: 22014 · Notice or report: 12015 · Notice or report: 120152017 · Over the limit: 32017 · Over the limit: 32017 · Over the limit: 32017 · Notice or report: 22017 · Notice or report: 22018 · Over the limit: 42018 · Over the limit: 42018 · Over the limit: 42018 · Over the limit: 42018 · Notice or report: 42018 · Notice or report: 42018 · Notice or report: 42018 · Notice or report: 42019 · Over the limit: 32019 · Over the limit: 32019 · Over the limit: 32019 · Notice or report: 32019 · Notice or report: 32019 · Notice or report: 32020 · Over the limit: 42020 · Over the limit: 42020 · Over the limit: 42020 · Over the limit: 42020 · Notice or report: 42020 · Notice or report: 42020 · Notice or report: 42020 · Notice or report: 420202021 · Over the limit: 42021 · Over the limit: 42021 · Over the limit: 42021 · Over the limit: 42021 · Notice or report: 42021 · Notice or report: 42021 · Notice or report: 42021 · Notice or report: 42024 · Over the limit: 42024 · Over the limit: 42024 · Over the limit: 42024 · Over the limit: 42025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
47% over the limit · 2253% notice or report · 25

Across Massachusetts, 79% of violations are missed or late tests and 4% are water over a limit.

How far over the limit

at the limit2×5×10×100×+Combined Radium (-226 and...2024-10-01 · Combined Radium (-226 and -228): measured 5.82 PCI/L vs limit 5.00 PCI/L (1.2×)2024-07-01 · Combined Radium (-226 and -228): measured 7.20 PCI/L vs limit 5.00 PCI/L (1.4×)2024-04-01 · Combined Radium (-226 and -228): measured 6.66 PCI/L vs limit 5.00 PCI/L (1.3×)2024-01-01 · Combined Radium (-226 and -228): measured 6.11 PCI/L vs limit 5.00 PCI/L (1.2×)2021-10-01 · Combined Radium (-226 and -228): measured 8.90 PCI/L vs limit 5.00 PCI/L (1.8×)2021-07-01 · Combined Radium (-226 and -228): measured 8.50 PCI/L vs limit 5.00 PCI/L (1.7×)2021-04-01 · Combined Radium (-226 and -228): measured 7.80 PCI/L vs limit 5.00 PCI/L (1.6×)2021-01-01 · Combined Radium (-226 and -228): measured 6.90 PCI/L vs limit 5.00 PCI/L (1.4×)2020-10-01 · Combined Radium (-226 and -228): measured 6.80 PCI/L vs limit 5.00 PCI/L (1.4×)2020-07-01 · Combined Radium (-226 and -228): measured 6.10 PCI/L vs limit 5.00 PCI/L (1.2×)2020-04-01 · Combined Radium (-226 and -228): measured 6.00 PCI/L vs limit 5.00 PCI/L (1.2×)2020-01-01 · Combined Radium (-226 and -228): measured 6.90 PCI/L vs limit 5.00 PCI/L (1.4×)2019-10-01 · Combined Radium (-226 and -228): measured 7.00 PCI/L vs limit 5.00 PCI/L (1.4×)2019-04-01 · Combined Radium (-226 and -228): measured 6.70 PCI/L vs limit 5.00 PCI/L (1.3×)2019-01-01 · Combined Radium (-226 and -228): measured 6.10 PCI/L vs limit 5.00 PCI/L (1.2×)2018-10-01 · Combined Radium (-226 and -228): measured 6.40 PCI/L vs limit 5.00 PCI/L (1.3×)2018-07-01 · Combined Radium (-226 and -228): measured 6.50 PCI/L vs limit 5.00 PCI/L (1.3×)2018-04-01 · Combined Radium (-226 and -228): measured 6.80 PCI/L vs limit 5.00 PCI/L (1.4×)2018-01-01 · Combined Radium (-226 and -228): measured 6.10 PCI/L vs limit 5.00 PCI/L (1.2×)2017-10-01 · Combined Radium (-226 and -228): measured 6.60 PCI/L vs limit 5.00 PCI/L (1.3×)2017-04-01 · Combined Radium (-226 and -228): measured 5.80 PCI/L vs limit 5.00 PCI/L (1.2×)2017-01-01 · Combined Radium (-226 and -228): measured 6.00 PCI/L vs limit 5.00 PCI/L (1.2×)
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

9 ppb
7 ppb
6 ppb

Open now (24)

  1. 2021-11-10Public NoticePN Violation for NPDWR ViolationOpen
  2. 2021-08-10Public NoticePN Violation for NPDWR ViolationOpen
  3. 2021-05-11Public NoticePN Violation for NPDWR ViolationOpen
  4. 2021-02-10Public NoticePN Violation for NPDWR ViolationOpen
  5. 2020-11-10Public NoticePN Violation for NPDWR ViolationOpen
  6. 2020-08-10Public NoticePN Violation for NPDWR ViolationOpen
  7. 2020-05-11Public NoticePN Violation for NPDWR ViolationOpen
  8. 2020-02-10Public NoticePN Violation for NPDWR ViolationOpen
  9. 2019-08-10Public NoticePN Violation for NPDWR ViolationOpen
  10. 2019-05-11Public NoticePN Violation for NPDWR ViolationOpen
  11. 2019-02-10Public NoticePN Violation for NPDWR ViolationOpen
  12. 2018-11-10Public NoticePN Violation for NPDWR ViolationOpen
  13. 2018-08-10Public NoticePN Violation for NPDWR ViolationOpen
  14. 2018-05-11Public NoticePN Violation for NPDWR ViolationOpen
  15. 2018-02-10Public NoticePN Violation for NPDWR ViolationOpen
  16. 2017-08-10Public NoticePN Violation for NPDWR ViolationOpen
  17. 2017-05-11Public NoticePN Violation for NPDWR ViolationOpen
  18. 2015-02-10Public NoticePN Violation for NPDWR ViolationOpen
  19. 2014-11-10Public NoticePN Violation for NPDWR ViolationOpen
  20. 2012-08-10Public NoticePN Violation for NPDWR ViolationOpen
  21. 2012-02-10Public NoticePN Violation for NPDWR ViolationOpen
  22. 2011-11-10Public NoticePN Violation for NPDWR ViolationOpen
  23. 2011-08-10Public NoticePN Violation for NPDWR ViolationOpen
  24. 2011-05-11Public NoticePN Violation for NPDWR ViolationOpen

Every violation on record

  1. 2024-10-01Combined Radium (-226 and -228)MCL, Averagemeasured 5.82 PCI/L · limit 5.00 PCI/LPeriod ended · no return to compliance on file
  2. 2024-07-01Combined Radium (-226 and -228)MCL, Averagemeasured 7.20 PCI/L · limit 5.00 PCI/LPeriod ended · no return to compliance on file
  3. 2024-04-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.66 PCI/L · limit 5.00 PCI/LPeriod ended · no return to compliance on file
  4. 2024-01-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.11 PCI/L · limit 5.00 PCI/LPeriod ended · no return to compliance on file
  5. 2021-11-10Public NoticePN Violation for NPDWR ViolationOpen
  6. 2021-10-01Combined Radium (-226 and -228)MCL, Averagemeasured 8.90 PCI/L · limit 5.00 PCI/LPeriod ended · no return to compliance on file
  7. 2021-08-10Public NoticePN Violation for NPDWR ViolationOpen
  8. 2021-07-01Combined Radium (-226 and -228)MCL, Averagemeasured 8.50 PCI/L · limit 5.00 PCI/LPeriod ended · no return to compliance on file
  9. 2021-05-11Public NoticePN Violation for NPDWR ViolationOpen
  10. 2021-04-01Combined Radium (-226 and -228)MCL, Averagemeasured 7.80 PCI/L · limit 5.00 PCI/LPeriod ended · no return to compliance on file
  11. 2021-02-10Public NoticePN Violation for NPDWR ViolationOpen
  12. 2021-01-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.90 PCI/L · limit 5.00 PCI/LPeriod ended · no return to compliance on file
  13. 2020-11-10Public NoticePN Violation for NPDWR ViolationOpen
  14. 2020-10-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.80 PCI/L · limit 5.00 PCI/LPeriod ended · no return to compliance on file
  15. 2020-08-10Public NoticePN Violation for NPDWR ViolationOpen
  16. 2020-07-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.10 PCI/L · limit 5.00 PCI/LPeriod ended · no return to compliance on file
  17. 2020-05-11Public NoticePN Violation for NPDWR ViolationOpen
  18. 2020-04-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/L · limit 5.00 PCI/LPeriod ended · no return to compliance on file
  19. 2020-02-10Public NoticePN Violation for NPDWR ViolationOpen
  20. 2020-01-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.90 PCI/L · limit 5.00 PCI/LPeriod ended · no return to compliance on file
  21. 2019-10-01Combined Radium (-226 and -228)MCL, Averagemeasured 7.00 PCI/L · limit 5.00 PCI/LPeriod ended · no return to compliance on file
  22. 2019-08-10Public NoticePN Violation for NPDWR ViolationOpen
  23. 2019-05-11Public NoticePN Violation for NPDWR ViolationOpen
  24. 2019-04-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.70 PCI/L · limit 5.00 PCI/LPeriod ended · no return to compliance on file
  25. 2019-02-10Public NoticePN Violation for NPDWR ViolationOpen
Show the other 22 entries
  1. 2019-01-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.10 PCI/L · limit 5.00 PCI/LPeriod ended · no return to compliance on file
  2. 2018-11-10Public NoticePN Violation for NPDWR ViolationOpen
  3. 2018-10-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.40 PCI/L · limit 5.00 PCI/LPeriod ended · no return to compliance on file
  4. 2018-08-10Public NoticePN Violation for NPDWR ViolationOpen
  5. 2018-07-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.50 PCI/L · limit 5.00 PCI/LPeriod ended · no return to compliance on file
  6. 2018-05-11Public NoticePN Violation for NPDWR ViolationOpen
  7. 2018-04-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.80 PCI/L · limit 5.00 PCI/LPeriod ended · no return to compliance on file
  8. 2018-02-10Public NoticePN Violation for NPDWR ViolationOpen
  9. 2018-01-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.10 PCI/L · limit 5.00 PCI/LPeriod ended · no return to compliance on file
  10. 2017-10-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.60 PCI/L · limit 5.00 PCI/LPeriod ended · no return to compliance on file
  11. 2017-08-10Public NoticePN Violation for NPDWR ViolationOpen
  12. 2017-05-11Public NoticePN Violation for NPDWR ViolationOpen
  13. 2017-04-01Combined Radium (-226 and -228)MCL, Averagemeasured 5.80 PCI/L · limit 5.00 PCI/LPeriod ended · no return to compliance on file
  14. 2017-01-01Combined Radium (-226 and -228)MCL, Averagemeasured 6.00 PCI/L · limit 5.00 PCI/LPeriod ended · no return to compliance on file
  15. 2015-02-10Public NoticePN Violation for NPDWR ViolationOpen
  16. 2014-11-10Public NoticePN Violation for NPDWR ViolationOpen
  17. 2012-08-10Public NoticePN Violation for NPDWR ViolationOpen
  18. 2012-02-10Public NoticePN Violation for NPDWR ViolationOpen
  19. 2011-11-10Public NoticePN Violation for NPDWR ViolationOpen
  20. 2011-08-10Public NoticePN Violation for NPDWR ViolationOpen
  21. 2011-05-11Public NoticePN Violation for NPDWR ViolationOpen
  22. 2007-11-07Public NoticePN Violation for NPDWR ViolationBack in compliance

System details

Population served60
Service connections7
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityWrentham
EPA ZIP on file02093

Areas served

  • Wrentham, Norfolk County, 02093

Reading this record

Mount St Marys Abbey is a community water system that draws from groundwater and serves about 60 people in Wrentham, Massachusetts. 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.