County · Connecticut
Tolland County, Connecticut: drinking water records
Explore EPA records for 69 community water systems across 16 ZIP codes in Tolland 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 2 of the 69 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 69 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 |
|---|---|---|---|---|---|
| University of Connecticut - Main Campus CT0780021 | 27,199 | 180 | 2 | 0 | 0.7 ppbbelow the action level |
| Ctwc - Coventry Hills Div CT0320091 | 700 | 60 | 0 | 0 | 0 ppbbelow the action level |
| Woodhaven Apartments CT1600031 | 489 | 0 | 0 | 1 | 0.6 ppbbelow the action level |
| Vernon Village INC. CT1463011 | 430 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Knollwood Apartments CT0780051 | 312 | 0 | 0 | 2 | 0 ppbbelow the action level |
| Walden Apartments CT1600041 | 276 | 0 | 0 | 1 | 1.6 ppbbelow the action level |
| Johnson Memorial Hospital, INC CT1340032 | 250 | 0 | 0 | 1 | 10.2 ppbbelow the action level |
| Woodland Summit Community Water Assn CT1420041 | 216 | 0 | 0 | 4 | 0 ppbbelow the action level |
| Ivy Woods CT1429201 | 207 | 0 | 0 | 1 | 2 ppbbelow the action level |
| Tolland Water Dept - Torry Road CT1429191 | 204 | 0 | 0 | 3 | 0.8 ppbbelow the action level |
| White Oak Condominiums CT0780041 | 192 | 0 | 0 | 1 | 1.1 ppbbelow the action level |
| Renwood Apartments CT0780171 | 190 | 0 | 0 | 4 | 0 ppbbelow the action level |
| Orchard Acres Association CT0780061 | 176 | 0 | 0 | 5 | 1.1 ppbbelow the action level |
| Twin Hills Water District CT0320061 | 156 | 0 | 0 | 4 | 1.2 ppbbelow the action level |
| Maplewood-Millbrook Apartments CT0780161 | 153 | 0 | 0 | 3 | 0 ppbbelow the action level |
| Deer Park Apartments CT1600071 | 125 | 0 | 0 | 4 | 1.4 ppbbelow the action level |
| Club House Apartments CT0780101 | 115 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Hunting Lodge Apartments CT0780091 | 115 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Willington Ridge Condos - System #1 CT1606111 | 102 | 0 | 0 | 2 | 2.2 ppbbelow the action level |
| Willington Ridge Condos - System #2 CT1606211 | 102 | 0 | 0 | 1 | 1 ppbbelow the action level |
| Abby Water LLC CT0670021 | 100 | 0 | 0 | 2 | 2.2 ppbbelow the action level |
| Hillside Condominiums CT0670051 | 96 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Ridgeview Heights CT1600051 | 96 | 0 | 0 | 2 | 0 ppbbelow the action level |
| Woods Edge Apartments CT0780131 | 96 | 0 | 0 | 1 | 0 ppbbelow the action level |
| North Willington Village Condo Assoc. CT1600061 | 66 | 0 | 0 | 3 | 0 ppbbelow the action level |
| 890 Boston Turnpike CT0121081 | 60 | 0 | 0 | 2 | 3 ppbbelow the action level |
| Natural Park Apartments CT1600101 | 60 | 0 | 0 | 2 | 1.6 ppbbelow the action level |
| Southridge Park Apartments CT0120031 | 50 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Cook Drive Association CT0120111 | 49 | 0 | 0 | 1 | 1.2 ppbbelow the action level |
| Whispering Hills, LLC - Well D System CT0010111 | 48 | 0 | 0 | 1 | 1 ppbbelow the action level |
| Sunset Apartments LLC CT0120041 | 46 | 0 | 0 | 3 | 11.6 ppbbelow the action level |
| Mansfield Village, LLC CT0780251 | 40 | 0 | 0 | 1 | 12.2 ppbbelow the action level |
| Hebron Arms Apartments CT0670041 | 39 | 0 | 0 | 2 | 0.6 ppbbelow the action level |
| Hop River Homes CT0012011 | 26 | 0 | 0 | 2 | 39.6 ppbat or above the action level |
| Ctwc - Hebron Center Division CT0672031 | 1,927 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Tolland Water Department CT1423011 | 1,251 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Ctwc - Amston Lake Division CT0670331 | 910 | 0 | 0 | 0 | 1.5 ppbbelow the action level |
| Ctwc - Uconn South Eagleville Div. CT0787111 | 750 | 0 | 0 | 0 | 1.6 ppbbelow the action level |
| Ctwc - South Coventry System CT0320051 | 501 | 0 | 0 | 0 | 3.2 ppbbelow the action level |
| Ctwc - Northern Region-Lakeview Terrace CT0320021 | 472 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Stafford Hollow Water Association CT1341303 | 429 | 0 | 0 | 0 | 4.8 ppbbelow the action level |
| Hazardville - Rye Hill System CT1299031 | 352 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Willington Senior Center & Housing CT1609141 | 327 | 0 | 0 | 0 | 3.2 ppbbelow the action level |
| Ctwc - General Water Division CT0320071 | 306 | 0 | 0 | 0 | 9.2 ppbbelow the action level |
| Ctwc - Northern Region-Lakewood CT0320011 | 276 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Ctwc - Uconn Hunting Lodge Div. CT0787101 | 234 | 0 | 0 | 0 | 1.9 ppbbelow the action level |
| Ctwc - Pilgrim Hills Division CT0320041 | 229 | 0 | 0 | 0 | 3.1 ppbbelow the action level |
| Ctwc - London Park Division CT0670011 | 221 | 0 | 0 | 0 | 1.1 ppbbelow the action level |
| Carriage House Apartments CT0780181 | 196 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Ctwc - Northern Reg-Llynwood System CT0120021 | 192 | 0 | 0 | 0 | 5.7 ppbbelow the action level |
| Ctwc - Riversedge Division CT1609111 | 179 | 0 | 0 | 0 | 2.4 ppbbelow the action level |
| Baxter Farms Community Water Assoc CT1420021 | 175 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Ctwc - Crystal Springs Div. CT0787011 | 169 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Ctwc - Northern Reg-Nathan Hale System CT0320031 | 160 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Ctwc - Uconn Depot Div. CT0787091 | 153 | 0 | 0 | 0 | 5.5 ppbbelow the action level |
| Ctwc - Uconn Willowbrook Div. CT0787121 | 134 | 0 | 0 | 0 | 1.1 ppbbelow the action level |
| Aquarion-Valley View CT0780211 | 131 | 0 | 0 | 0 | 6.3 ppbbelow the action level |
| Wellswood Estates Foundation, INC. CT0671021 | 112 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Coventry Housing Authority-Lower System CT0320171 | 80 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Coventry Housing Authority-Upper System CT0320181 | 80 | 0 | 0 | 0 | 3.9 ppbbelow the action level |
| Ctwc - Birchwood Heights CT0780121 | 76 | 0 | 0 | 0 | 1.7 ppbbelow the action level |
| Ctwc - Pinewoods Lane Div CT0780081 | 68 | 0 | 0 | 0 | 7.1 ppbbelow the action level |
| Ctwc - Northern Reg-Reservoir Heights CT1462011 | 62 | 0 | 0 | 0 | 1.3 ppbbelow the action level |
| Ctwc - Wellswood Village Div CT0672021 | 60 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Eastview Kozley Water Association CT1420081 | 60 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Ctwc - Columbia Heights Div. CT0300011 | 32 | 0 | 0 | 0 | 1.3 ppbbelow the action level |
| Woodland Terrace CT0300071 | 27 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Dartmouth Village Elderly Housing CT0309051 | 25 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Village at Crystal Springs CT1429171 | 25 | 0 | 0 | 0 | 0 ppbbelow the action level |
Shaded rows report lead at or above the 15 ppb action level in their latest monitoring period. EPA sets that level for the value 9 in 10 sampled homes fall at or below; reaching it requires the utility to act, and it is not a measurement of any single tap. One system in this table is at or above it. What an action level means
USGS · Monitoring stations
The water, more recently.
Available station readings in Tolland County, Connecticut. 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 Tolland County
16ZIP 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
- Coventry Lake
- Crystal Lake
- Mansfield Center
- Rockville
- Somers
- Stafford Springs
- Storrs
View ZIP areas and understand coverage
- 06029Crystal Lake
- 06043
- 06066Rockville
- 06071Somers
- 06072
- 06076Stafford Springs
- 06084Crystal Lake
- 06231
- 06232
- 06237
- 06238Coventry Lake
- 06248
- 06250Mansfield Center
- 06268Storrs
- 06269Storrs
- 06279
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.