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Counties → Louisiana

Calcasieu Parish, Louisiana

SDWIS compliance plate

Sheet LA019 · Calcasieu Parish 80 sys · 3,535 viol · #315/3254

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

  • VIOL-SEVERE 90.0% flagged
  • HEALTH-MID 25.4% health
  • RANK-TOP #315/3254
  • PHOTO-FINISH ±0.3 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 100%
  • SYS-MID 80 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Lafayette Parish (+ 0.3 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Calcasieu Parish ranks #315 of 3,254 counties by people served, and #7 of 64 counties in Louisiana. See methodology · corpus placement.

Calcasieu Parish standing, lower-flagged corpus third

Flagged-system rate 90.0% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 25.4% 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 #315 of 3,254 · #7 of 64 in Louisiana.

Flagged-rate neighbourhood around Calcasieu Parish

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

0% 20% 40% 60% 80% 100% St. Tammany Pa · lowest Lafayette Pari · near East Carroll P · highest 78.9% 89.5% 90% 90.3% 90.9% 91.4% 100%

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

Water Systems

System Name Population Violations PFAS
City of Lake Charles Water System 79,500 15 Clean
Sulphur City of Water System 24,489 71 Clean
Calcasieu Parish Ww District No 1 20,837 30 Clean
Calcasieu Parish Ww Dist 9 Carlyss 14,502 56 Clean
Houston River Waterworks District 11 6,915 33 Clean
Calcasieu Parish Ww District 8 6,834 19 Clean
Calcasieu Parish Ww District No 5 5,388 37 Clean
Dequincy Water System (Lawco) 5,370 1 Clean
Calcasieu Parish Ww District No 4 5,340 28 Clean
Westlake City of Water System 4,858 57 Clean
Calcasieu Parish Ww District 7 4,791 15 Clean
Town of Vinton Water System 4,101 16 Clean
Town of Iowa Water System 3,636 39 Clean
Calcasieu Ww #14 Ward 5 3,150 47 -
Delta Downs Inc Water System 2,481 39 -
Gulf Stream Manor Water System 2,130 210 -
Calcasieu Parish Ww 12 Ward 3 2,130 4 -
Westlake US 2 LLC S Complex Water System 1,700 33 -
Citgo Petroleum Refinery Water System 1,263 65 -
Quail Ridge Estates Water System 1,119 25 -
Toomey Rest Area Water System 1,001 1 -
Waterworks Dist. No. 10 of Ward 7 942 9 -
Country Pines North Subdivision WS 936 100 -
Phillips 66 Lake Charles Refinery 770 53 -
Fairview Mobile Estates North WS 669 20 -
Mossville Ww District No 2 660 47 -
Magnolia-Lake Street 651 61 -
Maplewood Place Park Water System 597 1 -
Country Pines South Subdivision WS 570 0 -
The Charleston Mhc Water System 567 40 -
Border Town Travel Plaza 500 1 -
Garden Heights Water System 465 13 -
Smith Mobile Home Village Water System 444 97 -
The Sallier Mhc Water System 400 44 -
Fairview Mobile Estates South WS 378 26 -
Prairie Plaza Water System 350 45 -
Oak Meadows Subdivision Water System 318 35 -
Magnolia-Utility Service of Lake Charles 306 106 -
The Longhorn Truck Stop and Restaurant 300 4 -
Cash Magic-Vinton Water System 300 8 -
Lake Charles Harbor Terminal District WS 300 0 -
Magnolia-Brigas Estates 294 128 -
Sugarcane Townes Water System 288 6 -
Osprey Lakes RV Park Water System 279 12 -
Oak Pine Mobile Home Park Water System 240 66 -
Pharos Mobile Home Community South 222 132 -
River Church Water System 220 15 -
Texas Pelican Complex 200 28 -
Pharos Mobile Home Community North 162 143 -
The Reserve Mhc Water System 159 30 -

Compare beyond Louisiana

Lower-flagged peers for Calcasieu Parish

Cross-state counties nearest Calcasieu Parish on flagged-system share (90.0%) and cumulative violation count (3,535). 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.