County · Massachusetts
Middlesex County, Massachusetts: drinking water records
Explore EPA records for 97 community water systems across 81 ZIP codes in Middlesex County, then find water-testing resources and available recent monitoring-station readings.
Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages
Drinking-water records
EPA survey and compliance records are historical reports. UCMR 5 results are available for 54 of the 97 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems in this county
All 97 active community systems in the available county records, sorted by record completeness. Scroll the table to explore more systems.
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Lowell Regional Water Utility MA3160000 | 120,418 | 120 | 3 | 1 | 0 ppbbelow the action level |
| Somerville Water Dept. (MWRA) MA3274000 | 81,045 | 120 | 0 | 1 | 3.9 ppbbelow the action level |
| Medford Water Dept. (MWRA) MA3176000 | 61,700 | 120 | 0 | 2 | 8.4 ppbbelow the action level |
| Billerica Water Works MA3031000 | 42,119 | 120 | 5 | 3 | 2.4 ppbbelow the action level |
| Tewksbury Water Department MA3295000 | 31,342 | 120 | 3 | 2 | 1 ppbbelow the action level |
| Melrose Water Division (MWRA) MA3178000 | 29,938 | 120 | 0 | 1 | 10.2 ppbbelow the action level |
| Reading Water Department (MWRA) MA3246000 | 26,262 | 120 | 0 | 1 | 8.4 ppbbelow the action level |
| Stoneham Water Dept (MWRA Supply) MA3284000 | 23,244 | 120 | 0 | 1 | 1.4 ppbbelow the action level |
| Wilmington Water Dept MA3342000 | 21,654 | 300 | 2 | 1 | 1.8 ppbbelow the action level |
| Concord Water Dept MA3067000 | 18,788 | 330 | 4 | 2 | 5.1 ppbbelow the action level |
| Sudbury Water District MA3288000 | 18,416 | 300 | 6 | 1 | 3.5 ppbbelow the action level |
| North Reading Water Dept. MA3213000 | 16,379 | 120 | 3 | 4 | 1.7 ppbbelow the action level |
| Holliston Water Department MA2136000 | 15,139 | 190 | 5 | 4 | 2.9 ppbbelow the action level |
| Hanscom Afb MA3023002 | 11,789 | 240 | 0 | 1 | 4.8 ppbbelow the action level |
| Lincoln Water Dept MA3157000 | 5,593 | 240 | 3 | 1 | 2.2 ppbbelow the action level |
| Cambridge Water Department MA3049000 | 118,214 | 120 | 3 | 0 | 8 ppbbelow the action level |
| Newton Water Dept. (MWRA) MA3207000 | 88,931 | 120 | 0 | 0 | 1.3 ppbbelow the action level |
| Framingham Water Dept. (MWRA) MA3100000 | 72,362 | 120 | 0 | 0 | 1.6 ppbbelow the action level |
| Malden Water Division (MWRA) MA3165000 | 66,263 | 120 | 0 | 0 | 9.7 ppbbelow the action level |
| Waltham Water Department MA3308000 | 65,218 | 120 | 0 | 0 | 1.9 ppbbelow the action level |
| Everett Water Dept. (MWRA) MA3093000 | 49,075 | 120 | 0 | 0 | 5.7 ppbbelow the action level |
| Arlington Water Dept. (MWRA) MA3010000 | 46,308 | 120 | 0 | 0 | 2.8 ppbbelow the action level |
| Marlborough DPW Water Div. (MWRA) MA2170000 | 41,799 | 120 | 0 | 0 | 3.3 ppbbelow the action level |
| Woburn Water Dept. MA3347000 | 40,876 | 180 | 6 | 0 | 1.3 ppbbelow the action level |
| Natick Water and Sewer Division MA3198000 | 37,006 | 240 | 6 | 0 | 0 ppbbelow the action level |
| Watertown Department of Public Works MA3314000 | 35,985 | 120 | 0 | 0 | 1.1 ppbbelow the action level |
| Lexington Water Dept. (MWRA) MA3155000 | 34,074 | 120 | 0 | 0 | 1.8 ppbbelow the action level |
| Chelmsford Water District MA3056000 | 28,750 | 240 | 5 | 0 | 2.4 ppbbelow the action level |
| Belmont Water Dept. (MWRA) MA3026000 | 27,442 | 120 | 0 | 0 | 1.5 ppbbelow the action level |
| Wakefield Water Dept MA3305000 | 27,090 | 239 | 3 | 0 | 1.5 ppbbelow the action level |
| Burlington Water Dept MA3048000 | 25,864 | 240 | 1 | 0 | 2.2 ppbbelow the action level |
| Dracut Water Supply District MA3079000 | 25,808 | 240 | 3 | 0 | 0 ppbbelow the action level |
| Winchester Water Dept MA3344000 | 22,970 | 240 | 0 | 0 | 4.2 ppbbelow the action level |
| Acton Water Supply District MA2002000 | 21,285 | 300 | 8 | 0 | 3.6 ppbbelow the action level |
| Hudson Water Supply MA2141000 | 20,032 | 130 | 1 | 0 | 2.7 ppbbelow the action level |
| Westford Water Department MA3330000 | 18,848 | 215 | 5 | 0 | 2.9 ppbbelow the action level |
| Ashland Water and Sewer Dept. MA3014000 | 18,832 | 60 | 1 | 0 | 1.6 ppbbelow the action level |
| Bedford Water Dept. MA3023000 | 14,955 | 120 | 0 | 0 | 4 ppbbelow the action level |
| Wayland Water Department MA3315000 | 14,096 | 240 | 6 | 0 | 4.2 ppbbelow the action level |
| Hopkinton Water Department MA2139000 | 12,680 | 210 | 5 | 0 | 7.4 ppbbelow the action level |
| Weston Water Dept. MA3333000 | 11,391 | 120 | 0 | 0 | 2.0 ppbbelow the action level |
| Maynard DPW, Water Division MA2174000 | 10,616 | 180 | 5 | 0 | 2.4 ppbbelow the action level |
| Kenwood Water District MA3079001 | 9,620 | 240 | 4 | 0 | 2 ppbbelow the action level |
| Littleton Water Department MA2158000 | 9,307 | 60 | 0 | 0 | 0 ppbbelow the action level |
| Pepperell DPW Water Division MA2232000 | 9,217 | 150 | 2 | 0 | 1.1 ppbbelow the action level |
| Ayer DPW Water Division MA2019000 | 8,479 | 120 | 3 | 0 | 2.8 ppbbelow the action level |
| North Chelmsford Water Dist MA3056002 | 7,660 | 60 | 0 | 0 | 3.5 ppbbelow the action level |
| Townsend Water Department MA2299000 | 6,832 | 270 | 3 | 0 | 1.6 ppbbelow the action level |
| Devens Massdevelopment MA2019001 | 6,500 | 180 | 2 | 0 | 0 ppbbelow the action level |
| Groton Water Department MA2115000 | 5,456 | 120 | 1 | 0 | 4.7 ppbbelow the action level |
| Tyngsborough Water District MA3301000 | 4,416 | 240 | 3 | 0 | 1.5 ppbbelow the action level |
| Shirley Water District MA2270000 | 4,165 | 180 | 5 | 0 | 2.1 ppbbelow the action level |
| Mci Shirley MA2270001 | 3,500 | 60 | 1 | 0 | 0 ppbbelow the action level |
| Tewksbury Hospital MA3295001 | 2,500 | 0 | 0 | 2 | 0 ppbbelow the action level |
| Harvard Ridge Condominium MA2037002 | 350 | 0 | 0 | 2 | 3.3 ppbbelow the action level |
| Regency at Stow Condominiums MA2286033 | 132 | 0 | 0 | 1 | 1.1 ppbbelow the action level |
| Colony Heights Condominium MA3301020 | 120 | 0 | 0 | 1 | 5 ppbbelow the action level |
| Pine Hill Condominium MA2002010 | 95 | 0 | 0 | 1 | 0.7 ppbbelow the action level |
| Liberty House Condominium MA2037014 | 80 | 0 | 0 | 1 | 1 ppbbelow the action level |
| The Preserve at Hopkinton Condo MA2139008 | 80 | 0 | 0 | 1 | 4.5 ppbbelow the action level |
| Haystack Estates MA3330019 | 60 | 60 | 4 | 0 | 0 ppbbelow the action level |
| Hanscom Family Housing (Landings) MA3157001 | 3,067 | 0 | 0 | 0 | 1.5 ppbbelow the action level |
| East Chelmsford Water District MA3056001 | 2,800 | 0 | 0 | 0 | 0 ppbbelow the action level |
| West Groton Water Supply District MA2115001 | 1,853 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Applewood Community Corporation MA2037013 | 500 | 0 | 0 | 0 | 4.1 ppbbelow the action level |
| Paddock Estates MA2037036 | 463 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Brook Village Condominium MA2037007 | 400 | 0 | 0 | 0 | 1.6 ppbbelow the action level |
| Codman Hill Condominium MA2037001 | 360 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Dunstable Water Department MA2081000 | 337 | 0 | 0 | 0 | 1.7 ppbbelow the action level |
| Villages at Stow MA2286024 | 300 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Juniper Hill Water Company MA2286000 | 220 | 0 | 0 | 0 | 2.9 ppbbelow the action level |
| Bedford VA Hospital (Rogers Mem. Hosp.) MA3023001 | 177 | 0 | 0 | 0 | 4 ppbbelow the action level |
| Pilot Grove Apartments MA2286018 | 175 | 0 | 0 | 0 | 0 ppbbelow the action level |
| River Crossing Condominium MA3301002 | 150 | 0 | 0 | 0 | 0.6 ppbbelow the action level |
| Pilot Grove Apartments II MA2286031 | 134 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Arbor Glen Condominiums MA2286026 | 132 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Woodland Ridge MA2270009 | 125 | 0 | 0 | 0 | 0.6 ppbbelow the action level |
| Fields at Sherborn Condo Trust MA3269032 | 110 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Deerfield Estates MA2139006 | 100 | 0 | 0 | 0 | 13 ppbbelow the action level |
| Enclave at Boxborough MA2037038 | 100 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Estates at Highland Ridge MA2139010 | 100 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Curtis Hill Condominium MA3301035 | 96 | 0 | 0 | 0 | 5.7 ppbbelow the action level |
| The Meeting House @ Stow Condo MA2286012 | 92 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Carriage House Condominium MA2037009 | 68 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Benchmark Condominiums MA3301008 | 60 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Maillet Woods Condominiums MA2139011 | 55 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Elizabeth Brook Apartments MA2286017 | 54 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Woodward Village MA3051023 | 54 | 0 | 0 | 0 | 0 ppbbelow the action level |
| The Village at Shepley Hill MA2115012 | 52 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Benfield Farms MA3051021 | 50 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Still Meadow Village Condominiums MA2115009 | 50 | 0 | 0 | 0 | 1.6 ppbbelow the action level |
| Village at Highland Park MA2139007 | 50 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Centre Village Apartments MA2037006 | 36 | 0 | 0 | 0 | 13.1 ppbbelow the action level |
| Garrison Place Condominium Trust MA3051022 | 32 | 0 | 0 | 0 | 3 ppbbelow the action level |
| Woodhaven Elder Housing Committee MA3269002 | 30 | 0 | 0 | 0 | 5.5 ppbbelow the action level |
| Leland Farms MA3269028 | 25 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Carlisle Village Court MA3051025 | 25 | 0 | 0 | 0 | not reported |
USGS · Monitoring stations
The water, more recently.
Available station readings in Middlesex County, Massachusetts. Each measurement keeps its time, unit and original source.
These readings describe water at a monitoring station. They do not test your tap, measure PFAS or lead, or determine whether water is safe to drink or swim in.
Recent observations load when this section comes into view.
How these readings update
We check for updates every 10 minutes while this section is visible and show supported observations from the last 48 hours. The time beside a reading is when USGS measured it; the checked time is when our service retrieved the response. We mark a reading more than 6 hours old as older. Provisional observations can change after USGS review. A missing reading does not mean zero or clean water.
Temperature, pH, dissolved oxygen, turbidity, conductivity, streamflow and water level are shown only where a station reports them. Different measurements have different units and sampling intervals. USGS data and documentation.
Your next step
Water testing, reports & local help.
Use these official directories to find your drinking-water agency, a certified laboratory and public water records. We have not yet added an individually reviewed local resource list for this county.
Official national directories
Water testing
Find your state’s private-well program
EPA’s state directory points well owners to local program information. Services and eligibility vary by state and county.
Water testing
Find a certified drinking-water laboratory
Use EPA’s directory to reach your state’s laboratory certification program. EPA does not provide on-request testing of residential drinking water.
Public records
Find your utility’s Consumer Confidence Report
EPA links to community water-system reports and explains how to read them. Look for your actual supplier rather than assuming every address in a county shares one system.
Public records
Explore USGS water observations
Find current and historical observations from USGS monitoring locations, including available stream, lake, and groundwater data. Measurements vary by station and do not replace a test of your household water.
A county overview cannot identify every property’s water provider. If you use a public water system, confirm its name on your bill and request its annual Consumer Confidence Report. Private wells need their own testing; public-system records do not describe a private well.
Understand water testing and laboratory reportsResource descriptions are compiled by Tap Water Lookup. Review dates describe our source check, not a new water sample. How we review sources · Suggest a correction
Explore your area
Local coverage in Middlesex County
81ZIP areas in this overview
Explore the water-system records, recent station readings and testing resources on this county page. They describe the systems and stations identified in each section; they are not a separate water test for every community.
Towns and communities
- Arlington
- Belmont
- Burlington
- Cambridge
- Cochituate
- Devens
- Everett
- Framingham
- Groton
- Hanscom AFB
- Hopkinton
- Hudson
- Lexington
- Littleton Common
- Lowell
- Malden
- Marlborough
- Maynard
- Medford
- Melrose
- Methuen Town
- Newton
- Pepperell
- Pinehurst
- Reading
- Shirley
- Somerville
- Stoneham
- Townsend
- Wakefield
- Waltham
- Watertown Town
- West Concord
- Wilmington
- Winchester
- Woburn
View ZIP areas and understand coverage
- 01431
- 01432Devens
- 01450Groton
- 01460Littleton Common
- 01463Pepperell
- 01464Shirley
- 01469Townsend
- 01474
- 01701Framingham
- 01702Framingham
- 01718
- 01719
- 01720
- 01721
- 01730Burlington
- 01731Hanscom AFB
- 01741
- 01742West Concord
- 01746
- 01748Hopkinton
- 01749Hudson
- 01752Marlborough
- 01754Maynard
- 01760Cochituate
- 01770
- 01773Waltham
- 01775Maynard
- 01776
- 01778Cochituate
- 01801Woburn
- 01803Burlington
- 01821Pinehurst
- 01824Lowell
- 01826Methuen Town
- 01827
- 01850Lowell
- 01851Lowell
- 01852Lowell
- 01854Lowell
- 01862
- 01863
- 01864
- 01867Reading
- 01876
- 01879
- 01880Wakefield
- 01886
- 01887Wilmington
- 01890Winchester
- 02138Cambridge
- 02139Cambridge
- 02140Cambridge
- 02141Cambridge
- 02142Cambridge
- 02143Somerville
- 02144Somerville
- 02145Somerville
- 02148Malden
- 02149Everett
- 02155Medford
- 02176Melrose
- 02180Stoneham
- 02420Lexington
- 02421Lexington
- 02451Waltham
- 02452Waltham
- 02453Waltham
- 02458Newton
- 02459Newton
- 02460Newton
- 02461Newton
- 02462Newton
- 02464Newton
- 02465Newton
- 02466Newton
- 02468Newton
- 02472Watertown Town
- 02474Arlington
- 02476Arlington
- 02478Belmont
- 02493
These Census ZIP Code Tabulation Areas are grouped here by their largest county overlap. A ZIP area can cross county lines and contain several water suppliers or private wells. Place labels reflect Census geography, not verified postal city names or utility service boundaries.
Records for these areas are currently presented in this county overview rather than individual ZIP reports. An unpublished report does not mean there are no water records. Confirm your supplier on your water bill; if you use a private well, testing your own well is the relevant next step.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Database prepared 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.
Compiled by Tap Water Lookup from the sources identified on this page. Read the methodology and review process.