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Aquarion Water Company of Connecticut: service line inventory lookup
227,081 service line records across 95 town(s), copied from the utility's published inventory.
Official inventory
Data as of
2026-10-05 (source layer last updated) · copied 2026-10-08
PWSID
Multiple public water systems (not listed in source)
Utility phone
866-728-5023
Records excluded
0 (see methodology)
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Status breakdown
5,055Lead
2.2%
569Galvanized requiring replacement
0.3%
93,776Lead status unknown
41.3%
127,582Non-lead
56.2%
99Not classified
0.0%
PFAS (“forever chemicals”) in this utility's water systems
Aquarion Water Company of Connecticut runs many separate public water systems, and the inventory data does not say which system serves each address. These are its 13 systems with EPA UCMR 5 results; town pages and address results show the system(s) that serve each town where we can match them.
| System | Serves | PFOA max (ppt) | PFOS max (ppt) | PFAS detected |
|---|
| Aquarion Water Co of CT-Greenwich System CT0570011 | Greenwich, Stamford | 5.6 | 4.1 | 4 |
| Aquarion Water Co of CT-Litchfield Sys CT0740011 | Goshen, Litchfield, Torrington | ND | ND | 0 |
| Aquarion Water Co of CT-Main System CT0150011 | Beacon Falls, Bridgeport, Darien and others | 10.9 | 6.6 | 7 |
| Aquarion Water Co of CT-Mystic CT1370011 | Groton, Ledyard, Stonington | ND | ND | 1 |
| Aquarion Water Co of CT-New Canaan Sys CT0900011 | New Canaan, Stamford | 5.6 | ND | 3 |
| Aquarion Water Co of CT-New Milford CT0960011 | Brookfield, New Milford | 5.3 | 5.3 | 5 |
| Aquarion Water Co of CT-Newtown System CT0970011 | Newtown | 15.9 | 12.7 | 8 |
| Aquarion Water Co of CT-Noroton System CT0350011 | Darien, New Canaan, Norwalk and others | 5.8 | ND | 4 |
| Aquarion Water Co of CT-Ridgefield Sys CT1180011 | Ridgefield | 10.6 | 6.1 | 7 |
| Aquarion Water Co of CT-Simsbury System CT1280021 | East Granby, Granby, Simsbury | 4.4 | 4.3 | 4 |
| Aquarion Water Co of CT-Stamford CT1350011 | Darien, Greenwich, Stamford | 4.3 | ND | 3 |
| Aquarion Water Co of CT-TLWC Woodrich CT1666011 | Wolcott | 6.3 | 6.2 | 5 |
| Aquarion Water Co of CT-Valley System CT1240011 | Ansonia, Beacon Falls, Bethany and others | 8.1 | 6.9 | 6 |
ND = not detected (below the 4 ppt UCMR 5 reporting level).
UCMR 5 is a one-time EPA monitoring program, not a compliance determination. The values shown are the highest single sample result at any of the system's sampling points; one result above 4.0 ppt does not mean the system violates the PFAS rule, which is judged on running annual averages under separate compliance monitoring. Results describe the public water system, not an individual home.
In April 2024 EPA set enforceable limits (MCLs) of 4.0 ppt each for PFOA and PFOS, plus 10 ppt for PFHxS, PFNA and HFPO-DA (GenX) and a Hazard Index for mixtures, with compliance based on a running annual average at each sampling point and due in 2029 (EPA ↗). In May 2026 EPA proposed letting systems request two more years for PFOA/PFOS (to April 2031) and rescinding the PFHxS, PFNA, GenX and Hazard Index limits (EPA: extension proposal ↗ · EPA: rescission proposal ↗). These are proposals, not final rules, as of the date this page was built.
Source: EPA UCMR 5 final occurrence data (EPA page last updated 2026-08-28; samples collected January 2023 – December 2025) ↗. All PFAS results nationwide →
Towns served (in this dataset)
| Town | Records | Lead | Galvanized requiring replacement | Lead status unknown | Non-lead |
|---|
| Avon, CT | 1 | 0 | 0 | 1 | 0 |
| Bantam, CT | 84 | 0 | 1 | 61 | 22 |
| Beacon Falls, CT | 1,828 | 3 | 3 | 667 | 1,155 |
| Bethel, CT | 909 | 0 | 0 | 637 | 272 |
| Branford, CT | 2 | 0 | 0 | 0 | 1 |
| Bridgeport, CT | 31,918 | 2,893 | 36 | 10,811 | 18,169 |
| Bristol, CT | 1 | 0 | 0 | 1 | 0 |
| Brookfield, CT | 1,752 | 0 | 0 | 822 | 929 |
| Burlington, CT | 152 | 0 | 0 | 49 | 103 |
| Byram, CT | 9 | 1 | 0 | 4 | 4 |
| Canaan, CT | 848 | 0 | 31 | 635 | 181 |
| Cornwall, CT | 59 | 0 | 0 | 20 | 39 |
| Cornwall Bridge, CT | 2 | 0 | 0 | 2 | 0 |
| Cos Cob, CT | 1,940 | 156 | 15 | 1,041 | 726 |
| Danbury, CT | 459 | 0 | 0 | 164 | 295 |
| Darien, CT | 7,247 | 21 | 5 | 3,030 | 4,185 |
| Derby, CT | 512 | 0 | 0 | 326 | 186 |
| East Derby, CT | 1 | 0 | 0 | 1 | 0 |
| East Granby, CT | 85 | 0 | 0 | 5 | 80 |
| East Hampton, CT | 51 | 0 | 0 | 38 | 13 |
| East Litchfield, CT | 1 | 0 | 0 | 1 | 0 |
| Easton, CT | 1,170 | 1 | 0 | 702 | 466 |
| Fairfield, CT | 20,436 | 289 | 11 | 6,828 | 13,304 |
| Falls Village, CT | 6 | 0 | 0 | 6 | 0 |
| Farmington, CT | 42 | 0 | 0 | 19 | 23 |
| Georgetown, CT | 18 | 0 | 0 | 12 | 6 |
| Glenville, CT | 96 | 3 | 0 | 57 | 36 |
| Goshen, CT | 63 | 0 | 0 | 28 | 35 |
| Granby, CT | 535 | 0 | 0 | 195 | 340 |
| Greenwich, CT | 11,532 | 906 | 29 | 5,939 | 4,652 |
| Groton, CT | 102 | 0 | 0 | 63 | 39 |
| Harwinton, CT | 188 | 0 | 0 | 55 | 133 |
| Kent, CT | 389 | 0 | 1 | 187 | 201 |
| Lakeville, CT | 743 | 0 | 11 | 605 | 127 |
| Lebanon, CT | 59 | 0 | 0 | 56 | 3 |
| Litchfield, CT | 1,181 | 0 | 25 | 870 | 281 |
| Mansfield, CT | 56 | 0 | 0 | 0 | 56 |
| Marlborough, CT | 163 | 0 | 0 | 106 | 57 |
| Middlebury, CT | 22 | 0 | 0 | 17 | 5 |
| Monroe, CT | 4,470 | 1 | 0 | 1,952 | 2,517 |
| Mystic, CT | 3,865 | 0 | 5 | 1,991 | 1,869 |
| New Canaan, CT | 4,125 | 0 | 12 | 2,335 | 1,777 |
| New Fairfield, CT | 550 | 0 | 0 | 315 | 235 |
| New Hartford, CT | 458 | 0 | 3 | 242 | 213 |
| New Haven, CT | 1 | 0 | 0 | 1 | 0 |
| New London, CT | 1 | 0 | 0 | 0 | 1 |
| New Milford, CT | 4,421 | 0 | 24 | 2,468 | 1,928 |
| New Preston, CT | 47 | 0 | 0 | 0 | 47 |
| Newtown, CT | 2,152 | 0 | 7 | 1,266 | 878 |
| Norfolk, CT | 450 | 0 | 1 | 234 | 215 |
| Noroton Heights, CT | 15 | 0 | 0 | 9 | 6 |
| North Canaan, CT | 65 | 0 | 1 | 54 | 10 |
| Norwalk, CT | 79 | 0 | 0 | 24 | 55 |
| Norwich, CT | 130 | 0 | 0 | 94 | 36 |
| Old Greenwich, CT | 2,516 | 194 | 17 | 1,211 | 1,094 |
| Old Mystic, CT | 23 | 0 | 0 | 21 | 2 |
| Orange, CT | 1 | 0 | 0 | 1 | 0 |
| Oxford, CT | 377 | 0 | 0 | 61 | 316 |
| Pine Meadow, CT | 18 | 0 | 0 | 12 | 6 |
| Plainville, CT | 7,018 | 0 | 23 | 3,430 | 3,564 |
| Redding, CT | 69 | 0 | 0 | 30 | 39 |
| Ridgefield, CT | 3,588 | 0 | 21 | 2,499 | 1,068 |
| Riverside, CT | 2,596 | 77 | 7 | 1,358 | 1,154 |
| Salisbury, CT | 343 | 0 | 6 | 305 | 31 |
| Sandy Hill, CT | 1 | 0 | 0 | 0 | 1 |
| Sandy Hook, CT | 384 | 0 | 0 | 85 | 298 |
| Seymour, CT | 4,122 | 0 | 3 | 2,189 | 1,930 |
| Shelton, CT | 13,018 | 7 | 7 | 6,237 | 6,761 |
| Sherman, CT | 242 | 0 | 0 | 170 | 72 |
| Simsbury, CT | 4,163 | 0 | 23 | 2,395 | 1,722 |
| Simscroft, CT | 1 | 0 | 0 | 1 | 0 |
| Southbury, CT | 211 | 0 | 0 | 153 | 58 |
| Southington, CT | 48 | 0 | 0 | 28 | 20 |
| Southport, CT | 612 | 18 | 0 | 279 | 315 |
| Stamford, CT | 23,854 | 6 | 175 | 3,414 | 20,252 |
| Stonington, CT | 1,586 | 0 | 0 | 1,046 | 539 |
| Storrs, CT | 1 | 0 | 0 | 0 | 1 |
| Stratford, CT | 18,717 | 450 | 11 | 5,421 | 12,820 |
| Suffield, CT | 219 | 0 | 0 | 155 | 64 |
| Torringford, CT | 1 | 0 | 0 | 0 | 1 |
| Torrington, CT | 10,252 | 1 | 49 | 5,351 | 4,850 |
| Trumbull, CT | 13,056 | 21 | 0 | 4,634 | 8,401 |
| Washington, CT | 118 | 0 | 0 | 77 | 41 |
| Washington Depot, CT | 18 | 0 | 0 | 18 | 0 |
| Weatogue, CT | 665 | 0 | 1 | 298 | 366 |
| West Mystic, CT | 15 | 0 | 0 | 15 | 0 |
| West Norwalk, CT | 1 | 0 | 0 | 0 | 1 |
| West Simsbury, CT | 728 | 0 | 0 | 483 | 245 |
| West Suffield, CT | 41 | 0 | 0 | 8 | 33 |
| Weston, CT | 112 | 0 | 0 | 55 | 57 |
| Westport, CT | 10,574 | 7 | 3 | 6,078 | 4,484 |
| Wilton, CT | 1,402 | 0 | 0 | 795 | 605 |
| Winsted, CT | 1 | 0 | 0 | 0 | 1 |
| Wolcott, CT | 106 | 0 | 0 | 0 | 106 |
| Woodbury, CT | 772 | 0 | 2 | 417 | 353 |
What to do next
- Confirm with your utility. Inventories change as lines are inspected and replaced. The utility's official map and customer service line are the authoritative source.
- If your status is unknown, many utilities ask customers to report what they see where the water pipe enters the building. EPA's Protect Your Tap guide explains how to check.
- Consider testing. EPA: “Since you cannot see, taste, or smell lead dissolved in water, testing is the only sure way of telling whether there are harmful quantities of lead in your drinking water.” Your utility or state health department can point you to certified laboratories.
- Use cold water. EPA: “Use only cold water for drinking, cooking and making baby formula. Remember, boiling water does not remove lead from water.”
- Filters. EPA: “If you use a filter, make sure you use a filter certified to remove lead.” See EPA's consumer tool for filters certified to reduce lead.
Disclaimer: Information is copied from the utility's published service line inventory and may be incomplete, out of date, or contain errors. It is not a substitute for water testing and does not describe interior plumbing. Contact your water utility for the official status of your service line. Health information is limited to quotations from EPA and CDC.