Quonnipaug Hills - Section I, CT
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2023-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
About Quonnipaug Hills - Section I
Quonnipaug Hills - Section I serves about 27 people through 9 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in New Haven County, Connecticut. EPA system ID: CT0606011; phone on file: 203-488-9500. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is down 1.4 ppb from 1.4 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Quonnipaug Hills - Section I is 2.2 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 1.4 ppb |
| 2019 | 2.2 ppb |
| 2016 | 2 ppb |
How Quonnipaug Hills - Section I compares
Of the 493 Connecticut systems with a lead result, the median latest reading is 0.8 ppb; 2 are over 15 ppb right now and 49 have gone over at some point. Quonnipaug Hills - Section I's reported as 0 (not detected) sits at the 1st percentile in Connecticut and the 1st nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
30 other systems share New Haven County; 13 of them have a higher latest lead result than Quonnipaug Hills - Section I. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Regional Water Authority | 418,900 | 0 (not detected) |
| Waterbury Water Department | 107,271 | 0.01 ppb |
| Meriden Water Division | 58,441 | 0 (not detected) |
| Wallingford Water Department | 37,267 | 0 (not detected) |
| Ctwc - Shoreline Region-Guilford System | 33,975 | 0 (not detected) |
| Ctwc - Naugatuck Region-Central System | 22,735 | 0 (not detected) |
| Aquarion-Valley | 13,080 | 1.1 ppb |
| Heritage Water Company | 7,300 | 0.7 ppb |
| Wolcott Water Department | 2,550 | 0 (not detected) |
| Ctwc - Legend Hill System | 1,368 | 0 (not detected) |
What to do in your house
Look up your address in Quonnipaug Hills - Section I's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Quonnipaug Hills - Section I whether it covers that cost before hiring anyone - many utilities now do.
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. The lead result guide covers how utilities pick the homes they sample. Small systems behave differently: why small systems go over more often.