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Counties → Florida

St. Johns County, Florida

SDWIS compliance plate

Sheet FL109 · St. Johns County 56 sys · 1,953 viol · #306/3254

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

  • VIOL-SEVERE 92.9% flagged
  • HEALTH-LOW 9.0% health
  • RANK-TOP #306/3254
  • PHOTO-FINISH ±0.1 pp
  • PFAS-LOW 12.5% detect
  • SRC-GW GW lead 100%
  • SYS-MID 56 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Columbia County ( -0.1 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, St. Johns County ranks #306 of 3,254 counties by people served, and #26 of 67 counties in Florida. See methodology · corpus placement.

St. Johns County standing, mid-flagged corpus third

Flagged-system rate 92.9% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 9.0% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 12.5% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #306 of 3,254 · #26 of 67 in Florida.

Flagged-rate neighbourhood around St. Johns County

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

0% 20% 40% 60% 80% 100% Dixie · lowest Nassau · near St. Johns · this county Monroe · highest 66.7% 92.3% 92.6% 92.8% 92.9% 93.8% 100%

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

Water Systems

System Name Population Violations PFAS
Sjcu-Cr214 Mainland WTP 66,953 35 Clean
Sjcu-Northwest Utilities WTP 48,040 10 Clean
St. Augustine WS 43,069 30 Clean
Sjcu-Ponte Vedra WS 15,565 61 Clean
Sjcu-Northeast Utilities WS 14,790 21 Clean
Sjcu-Sawgrass Grid 13,023 43 Detected
Jea: Ponte Vedra Grid 5,395 29 Clean
Sjcu-North Beach Utilities 4,200 20 Clean
Jea: Ponce de Leon Grid 2,303 10 -
Sjcu-Hastings WTP 1,095 46 -
Jea: Palm Valley WS 965 71 -
Wildwood Water Company 858 240 -
Church of Jc Lds - St. Johns Bldg 783 2 -
Southwoods Elementary (Aka J-School) 660 7 -
Sjcu-Eagle Creek WS 655 3 -
Sjcu-Fruit Cove Oaks WS 485 18 -
Homeowners Utilities Inc. 345 122 -
Camachee Cove Yacht Harbor WTP 312 79 -
Mill Creek Baptist Church 250 8 -
Geneva Presbyterian Church 214 14 -
Bayside Estates WTP 180 83 -
Sjcu-Bartram Oaks WTP 150 117 -
Marywood Retreat ; Conf Center 150 15 -
Florida Citrus Center #10 150 4 -
Buddy Boys Country Store 100 26 -
4 Lakes Campground 100 0 -
St. Augustine RV Park (Fka Shamrock) 96 33 -
Hastings Labor Camp / Spuds 96 28 -
Faver-Dykes State Park 75 19 -
Marywood Retreat - Camp St. John 75 25 -
Victory Tabernacle 75 57 -
Our Lady of Good Counsel 70 0 -
Yu an Farms 41 1 -
Oak Haven Retirement Village 40 190 -
Elkton Academy 40 10 -
Cypress Landing WTP 38 89 -
Trinity Freedom Farm 30 12 -
Freeman-McDonald Migrant Camp 29 15 -
Pellicer Creek Campground 25 23 -
Mobile Stn/Sunshine Food Mart#1 (Fka Dq) 25 27 -
Outback Crab Shack 25 23 -
Weedman's Express 25 13 -
Weedman's General Store 25 10 -
Colee Cove Junction 25 28 -
Kangaroo Express #6084 (Fka Circle K) 25 16 -
Amity Marina, LLC 25 112 -
Fountain of Youth 25 5 -
Segovia Oaks (Fka Bayside Village) 25 10 -
Jim's Place 25 5 -
South Logan Housing 25 2 -

Compare beyond Florida

Mid-flagged peers for St. Johns County

Cross-state counties nearest St. Johns County on flagged-system share (92.9%) and cumulative violation count (1,953). 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.