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Counties → Texas

Montgomery County, Texas

SDWIS compliance plate

Sheet TX339 · Montgomery County 458 sys · 18,154 viol · #86/3254

VIOL-SEVERE · HEALTH-LOW · RANK-TOP · PHOTO-FINISH · PFAS-LOW · SRC-GW · SYS-LARGE · BOOK-FULL

  • VIOL-SEVERE 82.3% flagged
  • HEALTH-LOW 10.8% health
  • RANK-TOP #86/3254
  • PHOTO-FINISH ±0.4 pp
  • PFAS-LOW 6.8% detect
  • SRC-GW GW lead 95%
  • SYS-LARGE 458 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Liberty County ( -0.4 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Montgomery County ranks #86 of 3,254 counties by people served, and #11 of 254 counties in Texas. See methodology · corpus placement.

Montgomery County standing, lower-flagged corpus third

Flagged-system rate 82.3% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 10.8% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 6.8% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #86 of 3,254 · #11 of 254 in Texas.

Flagged-rate neighbourhood around Montgomery County

Lowest/highest poles plus in-state counties nearest Montgomery County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.

0% 20% 40% 60% 80% 100% Howard · lowest Liberty · near Randall · near Bee · highest 66.7% 81.5% 81.9% 82.3% 82.9% 83.4% 100%

Source: EPA SDWIS (county aggregates) As of 2026-05-15

Water Systems

System Name Population Violations PFAS
City of Conroe 113,912 7 Clean
Porter Special Utility District 26,388 44 Clean
Montgomery Trace Water System 25,917 12 Detected
Montgomery County MUD 46 24,399 20 Clean
Montgomery County MUD 47 24,171 34 Clean
Montgomery County MUD 67 16,821 18 Clean
Montgomery County MUD 60 15,036 33 Clean
New Caney MUD 14,307 54 Clean
Southern Montgomery County MUD 13,372 29 Clean
Montgomery County MUD 7 12,528 17 Clean
Spring Creek Utility District 11,733 4 Clean
Rayford Road MUD 11,550 1 Clean
City of Willis 9,867 49 Clean
City of Splendora 9,612 91 Clean
Montgomery County MUD 6 8,610 11 Clean
Old Egypt Subdivision 8,442 10 Clean
The Woodlands MUD 1 7,989 12 Clean
Montgomery County MUD 18 7,608 17 Detected
City of Magnolia 7,107 74 -
Montgomery County MUD 119 Spring Trails 6,621 6 Clean
Montgomery County MUD 15 6,564 13 Detected
Montgomery County MUD 95 6,435 10 -
Town of Cut and Shoot 6,000 16 Clean
Montgomery County MUD 9 5,949 21 Clean
Benders Landing Water Plant 1 & 2 5,892 40 Clean
Montgomery County MUD 139 5,523 0 -
Montgomery County MUD 8 5,472 20 Clean
Montgomery County MUD 112 5,454 0 Clean
Montgomery County MUD 36 5,235 16 Clean
Montgomery County MUD 94 5,184 8 Clean
Montgomery County Ud 4 4,980 7 Clean
Conroe Isd Moorehead JR High School 4,945 44 Clean
Montgomery County MUD 89 4,899 5 Clean
Dobbin Plantersville WSC 1 4,767 172 Clean
Montgomery County MUD 115 4,599 0 -
Montgomery County MUD 19 4,422 12 Clean
Montgomery County MUD 39 4,284 20 Clean
City of Shenandoah 4,172 6 -
Valley Ranch MUD 1 4,056 0 Clean
East Montgomery County MUD 7 4,035 0 -
East Montgomery County MUD 6 3,939 4 -
Montgomery County Ud 3 3,825 13 Clean
Stanley Lake MUD 3,783 29 Clean
Decker Hills 3,780 44 Clean
City of Montgomery 3,771 36 -
Montgomery County MUD 99 3,675 0 -
Woodland Oaks Subdivision 3,666 6 Clean
City of Oak Ridge North 3,585 11 Clean
Montgomery County Wcid 1 3,396 8 Clean
Montgomery County Ud 2 3,381 4 -

Compare beyond Texas

Lower-flagged peers for Montgomery County

Cross-state counties nearest Montgomery County on flagged-system share (82.3%) and cumulative violation count (18,154). In-state neighbours stay on the compliance plate above.

Similar flagged-system rate

Nearest cross-state counties by % of SDWIS systems with at least one violation on record.

4 peers

Similar violation load

Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).

4 peers

Read our methodology · Check your water system - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.