Active hazard footprint
1 active alert
NWS or local alerts are currently active in the Atlas water-summary feed for this county.
No sewer overflow rows in the 30-day window.
County workspace
La Salle County
la-salle-county
La Salle County water profile
County-level water context pulled from the Atlas Texas summary service. Use this as operating context, not a regulatory determination.
1
Active alerts
0
Stream gauges
0
Sewer overflows (30d)
0
General permits
Investigation context
Weather + hydrology context for La Salle County
Composite operating context — active hazards, hydrologic features, surface-water condition, and infrastructure footprint — pulled from cached snapshots only.
Hydrology features
6 TWDB features
GULF_COAST · CARRIZO · Nueces · Rio Grande
3 Major Aquifers · 2 Major River Basins · 2 HUC 8 Hydrologic Units
Surface water condition
3 impaired / 3 segments
100% of cached TCEQ surface segments in this county carry at least one impairment flag.
Basin: Nueces River Basin
Drinking-water exposure
8 SDWIS violations
3 public water systems with cached health-based violations since 2023-04-01. 1,051 people served by those systems.
Top PWS: TPWD CHOKE CANYON STATE PARK CALLIHAM (6 viol.) · Top contaminant code: 0300
Stream gauge coverage
0 active gauges
No active stream gauges in the cached water-summary feed. Hydrologic stress signal lands once gauges fold in.
USGS streamflow anomaly + drought class join in next-up.
Boil-water proxy · microbial rule
6 microbial violations
1 PWS carry SDWIS rule-group 100 (microbial) violations — the same rule that triggers Texas boil-water advisories. 6 of those are Tier 1 (24-hour public notice).
Top PWS: TPWD CHOKE CANYON STATE PARK CALLIHAM (6 viol.) · Latest: 2023-07-01
Treatment stress · E2 disinfectant
No disinfectant violations cached
No cached SDWIS rule-group 200 disinfectant violations in this county. Treatment-stress signal activates as new D/DBP rule violations post.
Impaired surface segments in this county
- Choke Canyon ReservoirNueces River Basin · aquatic life, general use
- Frio River Above Choke Canyon ReservoirNueces River Basin · contact recreation
- San Miguel CreekNueces River Basin · contact recreation
Impairment is a legal-use-support classification, not a direct harm claim.
Mismatch signals
Score: 16
- • 3 impaired segments without any cached active permit pressure — enforcement gap candidate
Active alerts
Flood Watch
Stream gauges
No gauges loaded.
Notes
- • Nearby surface-water impairment context is additive only; it is not a standalone verdict on county-wide harm.
- • Surface-water segments: 3 (3 impaired)