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Counties → California

Imperial County, California

SDWIS compliance plate

Sheet CA025 · Imperial County 79 sys · 1,878 viol · #354/3254

VIOL-SEVERE · HEALTH-MID · RANK-TOP · PHOTO-FINISH · PFAS-CLEAN · SRC-SW · SYS-MID · BOOK-FULL

  • VIOL-SEVERE 94.9% flagged
  • HEALTH-MID 32.5% health
  • RANK-TOP #354/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-SW SW lead 59%
  • SYS-MID 79 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Tulare County (+ 0 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Imperial County ranks #354 of 3,254 counties by people served, and #31 of 58 counties in California. See methodology · corpus placement.

Imperial County standing, mid-flagged corpus third

Flagged-system rate 94.9% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 32.5% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #354 of 3,254 · #31 of 58 in California.

Flagged-rate neighbourhood around Imperial County

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

0% 20% 40% 60% 80% 100% Alpine · lowest Imperial · this county Mono · near Sutter · highest 70% 93.9% 94.9% 94.9% 95.7% 95.9% 97.1%

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

Water Systems

System Name Population Violations PFAS
El Centro, City Of 43,772 12 Clean
Calexico, City Of 40,357 17 Clean
Brawley, City Of 26,862 23 Clean
Imperial, City Of 21,591 39 Clean
Imperial Valley College 8,150 33 Clean
Gswc - Calipatria 7,363 6 Clean
Heber Public Utility District 6,979 51 Clean
Holtville, City Of 6,355 56 Clean
Calipatria State Prison 4,800 10 Clean
Centinela State Prison 4,100 57 Clean
Westmorland, City Of 2,202 60 -
Gateway 1,800 10 -
Seeley Cwd 1,729 131 -
McCabe Union School 1,250 40 -
Sunbeam Lake RV Resort 650 8 -
Naf El Centro 637 15 -
Country Life Mh & RV Park 600 36 -
Meadows Union Elementary School 550 41 Clean
Pilot Knob RV Resort 500 12 -
Palo Verde County Water Dist. 410 31 -
Ocotillo RV Resort 400 12 -
Winterhaven County Water District 394 32 -
Dhs Calexico 330 34 -
Spreckels Sugar Company 300 28 -
Gsa Calexico Port of Entry 300 41 -
Mesquite Mines Inc. 290 36 -
U.S. Gypsum Co 280 22 -
Pine Union School 217 28 -
Date Gardens Mobile Home Park 202 40 -
Old Eucalyptus Schoolhouse 200 4 -
Mitchells Camp Family Assoc. 175 12 -
Picacho State Reservation Area 155 19 -
Ocotillo Mutual Water Co 150 14 -
Magnolia Union School 142 11 -
Sportsmans Paradise 138 21 -
Rio Bend RV Golf Resort & Storm Crossing 130 16 -
Coyote Valley Mutual Water Co 125 18 -
Calenergy (Vulcan Power Plant) 108 0 -
Walters Camp RV Park 102 31 -
Mulberry Union School 85 13 -
Sonny Bono Salton Sea Wildlife Refuge 78 2 -
Valley Mobile Home Park 70 72 -
IV Desert Museum Society Inc. 64 6 -
Salamander Trailer Park 60 32 -
La Valle Sabbia Inc. 60 10 -
Gordon's Well #1 50 16 -
Gordon's Well Park # 2 50 12 -
Brandt Cattle 50 8 -
Calenergy (Administrative) 48 0 -
Allied Waste of Imperial Valley 45 18 -

Compare beyond California

Mid-flagged peers for Imperial County

Cross-state counties nearest Imperial County on flagged-system share (94.9%) and cumulative violation count (1,878). 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.