Active hazard footprint
0 active alerts
No NWS-driven alerts active in the cached water-summary feed. Drought + precipitation context land once those snapshots are committed.
No sewer overflow rows in the 30-day window.
County workspace
Shelby County
shelby-county
Shelby County county intelligence
Cross-source county ranking context from the Atlas county explorer service, with committed Wave 1 analytics overlays to help answer what changed and why.
Saving to the shared watchlist workspace.
Common county terms
Texas Water Development Board (TWDB)Hydrologic Unit Code (HUC)Public Water System (PWS)
43.85
Composite score
140
Composite rank
5
Highlight lanes
#44
Wave 1 risk rank
Investigation context
Weather + hydrology context for Shelby County
Composite operating context — active hazards, hydrologic features, surface-water condition, and infrastructure footprint — pulled from cached snapshots only.
Hydrology features
6 TWDB features
CARRIZO · CARRIZO · Neches · Sabine
3 Major Aquifers · 2 Major River Basins · 2 HUC 8 Hydrologic Units
Surface water condition
1 impaired / 5 segments
20% of cached TCEQ surface segments in this county carry at least one impairment flag.
Basin: Neches River Basin, Sabine River Basin
Drinking-water exposure
132 SDWIS violations
13 public water systems with cached health-based violations since 2023-04-01. 11,937 people served by those systems.
Top PWS: CITY OF HUXLEY (47 viol.) · Top contaminant code: 2950
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
2 microbial violations
2 PWSes carry SDWIS rule-group 100 (microbial) violations — the same rule that triggers Texas boil-water advisories.
Top PWS: PAXTON WSC (1 viol.) · Latest: 2024-09-21
Treatment stress · E2 disinfectant
115 disinfectant violations
5 PWSes carry SDWIS rule-group 200 (Disinfectants and Disinfection Byproducts Rule) violations — the same rule family that drives E2 disinfectant residual reporting.
Top PWS: CITY OF HUXLEY (47 viol.) · Top contaminant code: 2950 · Latest: 2025-10-01
Impaired surface segments in this county
- West CreekNeches River Basin · contact recreation
Impairment is a legal-use-support classification, not a direct harm claim.
Analytics snapshot
Risk trend from committed snapshots
Uses the committed county-history artifact only. Atlas does not backfill imaginary periods; if a previous snapshot is missing, this panel says so.
Risk scorePressure score
Risk score
1.38 · No change
Pressure score
1.11 · No change
Systems / violations
3 flagged systems shown
Pressure quadrant
High pressure + high risk
Interpretation
What changed and why
Shelby County is currently driven most by permits in the county explorer stack, while the committed analytics lane classifies it as high pressure + high risk.
Across the latest two committed snapshots, both the county risk score and pressure score are unchanged, so the analytical read is about persistent position rather than a new spike. The county is steady across the latest committed comparison window.
High pressure + high risk
This county sits above the current statewide median on both the pressure and risk axes in the committed scatter snapshot.
Grounding and caveats
County analytics are derived from committed SDWIS, ACS county population, surface-water-quality, and TWDB hydrology snapshots. History appends one real snapshot per run and never fabricates prior periods.
- • countyRiskScore is the statewide 0-100 normalization of summed SDWIS DWRS raw scores per county.
- • pressureScore is the statewide 0-100 normalization of impaired segment counts per 100k residents when population is available; otherwise it falls back to raw impaired segment count.
- • Rank deltas compare the newest county-history snapshot against the immediately preceding real snapshot.
- • Both axes are normalized to a 0-100 statewide range for stable chart consumption.
Driver decomposition
Top explorer lanes ranked against the statewide county stack. Percentile and contribution values are derived from the reusable Wave 1 analytics spine.
Permits
Rank #98 · 62.55 percentile
Value 9
12.51 pts into composite
28.53% of the current composite score from this lane.
CPI investigations
Rank #107 · 59.07 percentile
Value 1654
11.81 pts into composite
26.93% of the current composite score from this lane.
Sales tax rates
Rank #127 · 51.35 percentile
Value 15
10.27 pts into composite
23.42% of the current composite score from this lane.
County returns
Rank #130 · 50.19 percentile
Value 231531.50
10.04 pts into composite
22.90% of the current composite score from this lane.
Top systems behind the county signal
When county-history carries system-level highlights, Atlas surfaces the systems contributing the most to the latest committed risk snapshot.
CITY OF HUXLEY
PWS TX2100019
Risk contribution 0.73
47 violations in the cached snapshot
CITY OF TIMPSON
PWS TX2100003
Risk contribution 0.30
25 violations in the cached snapshot
PAXTON WSC
PWS TX2100012
Risk contribution 0.24
34 violations in the cached snapshot
Operator lane
Operators visible in this county snapshot
Ranked only from the current permittee and CID applicant snapshot. Atlas links out where operator presence is visible; it does not invent a deeper hierarchy or historical market share.
0 visible operators
No operator grouping is visible for this county in the current permit and CID snapshot.
County ↔ operator navigation
Move from county stress to named operators
County rankings show where signal concentrates. Operator pages show which named permittees and applicants are currently visible inside that signal.
This county currently has no grounded operator crosslink from the permit/CID dataset, so Atlas keeps the page anchored in county and permit context only.
- • County page: risk, hydrology, and statewide rank context.
- • Operator page: county footprint, open CID case posture, and pending permit roster.
- • Permit view: county-scoped transaction list for the current public snapshot.
Highlights
Top-ranked source lanes per the cached county overview.
Permits
Rank 98 · Value 9
CPI investigations
Rank 107 · Value 1654
Sales tax rates
Rank 127 · Value 15
County returns
Rank 130 · Value 231531.5
Water districts
Rank 131 · Value 2
Hydrology and surface-water condition fold into the investigation context block above; Texas Water Development Board (TWDB) + Hydrologic Unit Code (HUC) features are shared with the water county profile.