Ctwc - Green Springs System, CT
Exceeded the action level in the past
Latest 90th-percentile lead: 4.7 ppb (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 result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
About Ctwc - Green Springs System
Ctwc - Green Springs System serves about 104 people through 26 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: CT0760021; phone on file: 860-664-6125. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Ctwc - Green Springs System's lead record
That is up 1.4 ppb from 3.3 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Ctwc - Green Springs System is 22 ppb across 20 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 4.7 ppb |
| 2025 | 3.3 ppb |
| 2025 | 2.5 ppb |
| 2024 | 3.2 ppb |
| 2024 | 2.2 ppb |
| 2023 | 2.7 ppb |
| 2023 | 2.3 ppb |
| 2022 | 10.8 ppb over 10 |
| 2022 | 2.5 ppb |
| 2021 | 2 ppb |
| 2021 | 2 ppb |
| 2020 | 3 ppb |
| 2020 | 2 ppb |
| 2019 | 2 ppb |
| 2019 | 2 ppb |
| 2018 | 8 ppb |
| 2018 | 3.1 ppb |
| 2017 | 10.5 ppb over 10 |
| 2017 | 1.3 ppb |
| 2016 | 22 ppb over 15 |
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. Ctwc - Green Springs System's 4.7 ppb sits at the 90th percentile in Connecticut and the 90th nationally (higher means more lead).
Other water systems in New Haven County
30 other systems share New Haven County; 2 of them have a higher latest lead result than Ctwc - Green Springs System. 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) |
Your move
Test your own tap with a certified lab first-draw sample; Clinton, CT may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Ctwc - Green Springs System 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. More in what a past exceedance means today.