Largest public system
- Town of Mooresville: TTHM (disinfection byproducts)
- 59 ppb
- As reported (2025); federal limit 80 ppb.
- Town of Mooresville, 2025
- Town of Mooresville: HAA5 (disinfection byproducts)
- 48 ppb
- As reported (2025); federal limit 60 ppb.
- Town of Mooresville, 2025
- Town of Mooresville: Lead (at sampled homes' taps)
- Not detected
- Not detected (2024); 0 sampled homes above the action level. The federal action level is 15 ppb.
- Town of Mooresville, 2025