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Counties → Wyoming

Fremont County, Wyoming

SDWIS compliance plate

Sheet WY013 · Fremont County 60 sys · 2,787 viol · #1497/3254

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

  • VIOL-SEVERE 93.3% flagged
  • HEALTH-LOW 9.4% health
  • RANK-MID #1497/3254
  • PHOTO-FINISH ±0.5 pp
  • PFAS-MID 33.3% detect
  • SRC-GW GW lead 88%
  • SYS-MID 60 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Sublette County ( -0.5 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Fremont County ranks #1,497 of 3,254 counties by people served, and #9 of 23 counties in Wyoming. See methodology · corpus placement.

Fremont County standing, mid-flagged corpus third

Flagged-system rate 93.3% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 9.4% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 33.3% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #1,497 of 3,254 · #9 of 23 in Wyoming.

Flagged-rate neighbourhood around Fremont County

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

0% 20% 40% 60% 80% 100% Teton · lowest Sublette · near Laramie · near Niobrara · highest 87.1% 92.3% 92.9% 93.3% 94.1% 94.7% 100%

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

Water Systems

System Name Population Violations PFAS
Riverton, City Of 10,330 11 Detected
Lander, City Of 7,615 68 Clean
Dubois, Town Of 1,870 259 -
Shoshoni, Town Of 515 73 -
WY DOT-Sweetwater Rest Area 500 6 -
Hudson, Town Of 460 30 -
Wydot-South Pass Rest Area 401 4 -
Gardens North Homeowners Association 300 17 -
Teton Valley Ranch Camp-Dubois 250 17 -
Pavillion, Town Of 230 43 -
Sunridge Estates 220 26 -
B&k Mobile Home Park 200 89 -
Jade Mhc 200 367 -
Mhvc Sixth Crossing Ranch RV Park 200 11 -
Mountain View Acres 165 26 -
First Fike Subdivision 150 13 Clean
Line Shack Lodge 150 50 -
South Pass City Historical Site 131 41 -
Crooked Creek Guest Ranch 123 76 -
Mhvc Sage Cg 120 5 -
Miners Grubstake, LLC 103 44 -
Spence Foundation - Thunderhead Ranch 102 6 -
A & J Mobile Home Park 100 96 -
Rock Creek Hollow Lds Church Cg 100 14 -
Shoshone Nf-Falls Cg 100 3 -
Longhorn RV and Motel 96 9 -
Whiskey Mountain Conservation Camp 96 5 -
Boysen St Pk Hdqrts 90 14 -
Alpine Science Institute 85 152 -
Raintree Estates 83 15 -
Twin Pines RV Park 77 10 -
C M Ranch LLC 75 19 -
Fremont County Youth Camp 70 19 -
Warm Springs Water District 68 66 -
Triangle C Ranch 67 61 -
Brooks Lake Lodge 67 43 -
Redd Fox Park HOA 65 36 -
Farview Water and Sewer District 60 16 -
Lava Mountain Lodge 52 40 -
Atlantic City Mercantile 52 55 -
Lazy L and B Ranch 50 17 -
Bitterroot Ranch 47 20 -
Lost Cabin Gas Plant (Contango Res, LLC) 45 24 -
Juniper Park Water Association 42 0 -
Jeffrey City Water & Sewer District 40 598 -
Paintbrush Motel 40 5 -
Absaroka Ranch 35 14 -
Second Fike Subdivision 34 22 -
Ring Lake Ranch 34 20 -
Kinnear Store 31 65 -

Compare beyond Wyoming

Mid-flagged peers for Fremont County

Cross-state counties nearest Fremont County on flagged-system share (93.3%) and cumulative violation count (2,787). 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.