Is Rio Vista, Texas tap water safe?
5 water systems report serving Rio Vista. Your water depends on which one serves your address. Check your bill if unsure. This list is matched from the ZIP codes in this place, so it may include nearby systems.
A
Johnson County SUD
Serves 65,517 people · Surface water · Full report →
No health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
C
City of Rio Vista
Serves 1,040 people · Groundwater · Full report →
1 health-based violation in the last 5 years; 14 monitoring/reporting violations; 2 not yet resolved; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2023).
C
Fishermans Paradise
Serves 351 people · Groundwater · Full report →
1 health-based violation in the last 5 years; 29 monitoring/reporting violations; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2025).
A
Nolan River Estates
Serves 303 people · Groundwater · Full report →
No health-based violations in the last 5 years; 2 monitoring/reporting violations; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2023).
B
Westover Hills
Serves 150 people · Groundwater · Full report →
1 health-based violation in the last 5 years; 3 monitoring/reporting violations; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2024).