Arrowhead By The Lake Association, Inc., CT
Exceeded the action level in the past
Latest 90th-percentile lead: 1 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.
Arrowhead By The Lake Association, Inc. at a glance
Arrowhead By The Lake Association, Inc. serves about 288 people through 72 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: CT1669011; phone on file: 203-463-3200. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
Against the period ending 2025 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Arrowhead By The Lake Association, Inc. is 140 ppb across 13 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1 ppb |
| 2025 | 1 ppb |
| 2024 | 1 ppb |
| 2023 | 4 ppb |
| 2022 | 0 (not detected) |
| 2021 | 3 ppb |
| 2020 | 5 ppb |
| 2019 | 5 ppb |
| 2018 | 7 ppb |
| 2017 | 0 (not detected) |
| 2016 | 9 ppb |
| 2016 | 140 ppb over 15 |
| 2016 | 10 ppb |
Against other Connecticut systems
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. Arrowhead By The Lake Association, Inc.'s 1 ppb sits at the 56th percentile in Connecticut and the 52nd nationally (higher means more lead).
Neighbouring systems
30 other systems share New Haven County; 9 of them have a higher latest lead result than Arrowhead By The Lake Association, Inc.. 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; Seymour, 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 Arrowhead By The Lake Association, Inc. 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. What a 90th-percentile result does and does not tell you: how to read a lead result. More in what a past exceedance means today.