- Mac Holliman Lower Trinity Well 5663922 – End of MacHolliman Dr.
- Headwaters Monitor Well #1 Lower Trinity 6801704 – Lane Valley Rd.
- Headwaters Monitor Well #1 Middle Trinity 6801703 – Lane Valley Rd.
- Headwaters Monitor Well #2 Lower Trinity 6907107 – Upper Turtle Creek Rd.
- Headwaters Monitor Well #3 Lower Trinity 5757805 – Reserve at Falling Water
- Headwaters Monitor Well #4 Middle Trinity 5654405 – TPWL Mountain Home
- Headwaters Monitor Well #5 Middle Trinity 5661101 – Kerr Wildlife Management Area
- Headwaters Monitor Well #6 Middle Trinity 5655805 – Goat Creek Rd. N. of IH-10
- Headwaters Monitor Well #7 Lower Trinity 6908304 – Allen Kaiser Dr., Center Point
- Headwaters Monitor Well #7 Middle Trinity 6908305 -Allen Kaiser Dr., Center Point
- Headwaters Monitor Well #8 Middle Trinity 5643901 – Moon Shadows Ranch
- Headwaters Monitor Well #9 Middle Trinity 5659201 – Lang Ranch Hwy 83
- Headwaters Monitor Well #10 Middle Trinity 6904503 – Menagerie Ranch Hwy 39
- Headwaters Monitor Well #11 Lower Trinity 5663924 – Ranchero Rd.
- Headwaters Monitor Well #11 Middle Trinity 5663923 – Ranchero Rd.
- Headwaters Monitor Well #12 Middle Trinity 5652704 Hwy 1340 & 41
- Headwaters Monitor Well #13 Middle Trinity 5954106 – Reservation Rd.
- Headwaters Monitor Well #14 Middle Trinity 5664301 – Stuart Properties Hwy 16 N.
- Headwaters Monitor Well #14 Edwards 5664302 – Stuart Properties Hwy 16 N.
- Kelly Street Well (Aqua TX) Lower Trinity 6908513 – Kelly St. Center Point
- Headwaters Monitor Well #15 Lower Trinity 5661907 – Camp Mystic on Hwy 39
- Headwaters Monitor Well #16 Middle Trinity 5644901 – I-10 Frontage Rd. toward Junction
