31 Grist Mill Rd, CT
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2026-2026). 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.
31 Grist Mill Rd at a glance
31 Grist Mill Rd serves about 30 people through 14 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Middlesex County, Connecticut. EPA system ID: CT0419221; phone on file: 203-376-7958. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
31 Grist Mill Rd's lead record
Against the period ending 2025 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for 31 Grist Mill Rd is 14 ppb across 21 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2025 | 0 (not detected) |
| 2025 | 0 (not detected) |
| 2024 | 0 (not detected) |
| 2024 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2022 | 2.83 ppb |
| 2021 | 0 (not detected) |
| 2021 | 6.49 ppb |
| 2020 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2019 | 1.31 ppb |
| 2019 | 0 (not detected) |
| 2018 | 0 (not detected) |
| 2018 | 0 (not detected) |
| 2017 | 0 (not detected) |
| 2017 | 0 (not detected) |
| 2016 | 14 ppb over 10 |
| 2016 | 0 (not detected) |
Where this result ranks
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. 31 Grist Mill Rd'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.
Neighbouring systems
45 other systems share Middlesex County; 20 of them have a higher latest lead result than 31 Grist Mill Rd. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Middletown Water Department | 41,019 | 0 (not detected) |
| Cromwell Fire District Water Department | 14,316 | 0 (not detected) |
| Ctwc - Shoreline Region-Chester System | 5,030 | 0 (not detected) |
| Portland Water Department | 5,010 | 0 (not detected) |
| Connecticut Valley Hospital | 2,928 | 0 (not detected) |
| Durham Center Division | 1,601 | 0 (not detected) |
| Ctwc - Jensens Beechwood System | 750 | 1.7 ppb |
| Ctwc - Spice Hill Division | 712 | 0 (not detected) |
| Edgemere Condominium Assn., Inc. | 540 | 0 (not detected) |
| Yeshiva Of Waterbury-Durham Campus | 490 | 0 (not detected) |
Your move
Look up your address in 31 Grist Mill Rd'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 31 Grist Mill Rd 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. Why sampled homes are the worst-case ones is in the guide to reading the number. Small systems behave differently: why small systems go over more often.