PlainWater
Counties → Louisiana

County profile · EPA SDWIS + UCMR5

St. Martin Parish, Louisiana

25 SDWIS-listed public water systems serve 77,708 people in St. Martin Parish. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.

25
SDWIS water systems Middle third of counties
1,995
Total violations Middle third of counties
100.0%
SDWIS systems w/ a violation Middle third of counties
12.5%
UCMR5 PFAS rate (8 tested) Middle third of counties with tests

SDWIS compliance plate

Sheet LA099 · St. Martin Parish 25 sys · 1,995 viol · #686/3254

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

  • VIOL-SEVERE 100.0% flagged
  • HEALTH-HIGH 65.8% health
  • RANK-UPPER #686/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-LOW 12.5% detect
  • SRC-GW GW lead 96%
  • SYS-SMALL 25 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Jefferson Parish (+ 0 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, St. Martin Parish ranks #686 of 3,254 counties by people served, and #16 of 64 counties in Louisiana. See methodology · corpus placement.

St. Martin Parish 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 65.8% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 12.5% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #686 of 3,254 · #16 of 64 in Louisiana.

Flagged-rate neighbourhood around St. Martin Parish

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

0% 20% 40% 60% 80% 100% St. Tammany Pa · lowest Jefferson Pari · near Terrebonne Par · near 78.9% 100% 100% 100% 100% 100% 100%

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

Water Systems

System Name Population Violations PFAS
Village of Parks Water System 12,801 127 Detected
Cecilia Water Corporation 12,249 57 Clean
Bayou Teche Water Works 10,137 113 Clean
City of Breaux Bridge Water System 8,754 52 Clean
City of St Martinville Water System 7,575 121 Clean
Henderson Nina Water System Inc 5,136 18 Clean
United Water System 4,446 209 Clean
Town of Arnaudville Water System 3,957 47 Clean
St Martin Water Works District 3 - Cade 3,249 63 -
St Martin Water District 4 - Catahoula 3,000 208 -
St Martin Water and Sewer Commission 1 2,262 95 -
Butte la Rose Rest Area Water System 1,001 28 -
Vegas Style South 950 21 -
Cash Magic Breaux Bridge LLC 650 3 -
Cajun Heritage RV Park Water System 450 26 -
Breaux Bridge Casino Truck Stop WS 205 4 -
Minnows Shell Truck Stop Water System 200 8 -
St Martin Industrial Park Water System 150 242 -
Enso Fitness Water System 150 6 -
My Place Mobile Home Park Water System 111 159 -
Elm Point Estates Water System 90 188 -
Summit Hill Foods Water System 90 13 -
Cargill Breaux Bridge Water System 45 26 -
Breaux Bridge Gaming Water System 25 147 -
Uncle Dick Davis RV Park Water System 25 14 -

Compare beyond Louisiana

Mid-flagged peers for St. Martin Parish

Cross-state counties nearest St. Martin Parish on flagged-system share (100.0%) and cumulative violation count (1,995). 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. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.