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Counties → Arizona

Santa Cruz County, Arizona

SDWIS compliance plate

Sheet AZ023 · Santa Cruz County 37 sys · 6,256 viol · #955/3254

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

  • VIOL-SEVERE 100.0% flagged
  • HEALTH-LOW 4.9% health
  • RANK-UPPER #955/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-MID 33.3% detect
  • SRC-GW GW lead 100%
  • SYS-SMALL 37 systems
  • BOOK-FULL 7/7 fields

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

According to EPA SDWIS county population served used on /counties, Santa Cruz County ranks #955 of 3,254 counties by people served, and #11 of 15 counties in Arizona. See methodology · corpus placement.

Santa Cruz County standing, mid-flagged corpus third

Flagged-system rate 100.0% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 4.9% 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 #955 of 3,254 · #11 of 15 in Arizona.

Flagged-rate neighbourhood around Santa Cruz County

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

0% 20% 40% 60% 80% 100% Yuma · lowest Greenlee · highest Navajo · near Graham · near 94.1% 100% 100% 100% 100% 100% 100%

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

Water Systems

System Name Population Violations PFAS
Nogales City Of 22,000 1,954 Clean
Liberty Water Rio Rico 17,960 484 Detected
Valle Verde Water Company - East 2,331 469 -
Epcor - Tubac 2,076 138 -
Baca Float Water Company 1,090 78 -
Patagonia Water Department 819 145 Clean
AZ State Pks Patagonia Lake 564 31 -
Town & Country - Preston 430 316 -
Santa Cruz County Fairgrounds 297 71 -
DE Anza Trail RV 200 26 -
Tumacacori National Historic Park 170 23 -
Sonoita Valley (South) Water Company 169 165 -
The Grand Acres 153 139 -
Elgin School 150 103 -
Sonoita Mercantile Water System 125 108 -
Ac's Truck Stop 110 64 -
Kino Ranch 2 109 287 -
Adot Border Patrol 100 146 -
Gen Properties LLC 100 47 -
Parcel 1 Water 100 8 -
Avalon Gardens Water System 100 80 -
Mountain View RV Ranch 100 213 -
Wisdom Cafe 100 73 -
Cs Santa Cruz Water Co 82 53 -
Trujillo Trail Dwid 75 48 -
Valle Verde Water Company - West 74 128 -
Crisantes Greenhouse Water System 60 176 -
Sonoita Valley (North) Water Company 49 121 -
Smithsonian Inst II 35 47 -
Usfs Cnf Bog Springs 35 46 -
Sonoita Springs Water Company 30 36 -
Patagonia RV Park 28 34 -
Casas Arroyo Association Inc 27 121 -
Patagonia Sonoita Creek Preserve 25 31 -
Old Tumacacori Bar 25 133 -
Usfs-Cnf Nogales Admin 25 27 -
Red Rock Acres HOA 23 87 -

Compare beyond Arizona

Mid-flagged peers for Santa Cruz County

Cross-state counties nearest Santa Cruz County on flagged-system share (100.0%) and cumulative violation count (6,256). 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.