PlainWater
Counties → Louisiana

Ouachita Parish, Louisiana

SDWIS compliance plate

Sheet LA073 · Ouachita Parish 31 sys · 4,888 viol · #350/3254

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

  • VIOL-SEVERE 93.5% flagged
  • HEALTH-HIGH 77.8% health
  • RANK-TOP #350/3254
  • PHOTO-FINISH ±0.2 pp
  • PFAS-LOW 16.7% detect
  • SRC-GW GW lead 90%
  • SYS-SMALL 31 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Iberia Parish ( -0.2 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Ouachita Parish ranks #350 of 3,254 counties by people served, and #8 of 64 counties in Louisiana. See methodology · corpus placement.

Ouachita Parish standing, mid-flagged corpus third

Flagged-system rate 93.5% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 77.8% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 16.7% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #350 of 3,254 · #8 of 64 in Louisiana.

Flagged-rate neighbourhood around Ouachita Parish

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

0% 20% 40% 60% 80% 100% St. Tammany Pa · lowest Ouachita Paris · this county East Carroll P · highest 78.9% 91.7% 93.3% 93.5% 93.9% 95% 100%

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

Water Systems

System Name Population Violations PFAS
Monroe Water System 57,000 67 Detected
West Monroe Water System 16,005 203 Clean
West Hwy 80 Ark Road WS 14,649 217 Clean
Gowc North Water System 13,287 0 Clean
Gowc East Water System 11,742 0 Clean
Cheniere Drew North Water System 11,280 19 Clean
Southwest Ouachita Waterworks, Inc 10,725 426 Clean
Brownville Water System 9,696 201 Clean
Kiroli Darbonne WS 9,210 141 Clean
South Monroe WS Gowc 7,335 282 Clean
Cadeville Water District 6,219 512 Clean
Town & Country Service 5,715 46 Detected
Prairie Road Water District 2,598 312 -
Better Waterworks Water System 2,160 331 -
Indian Village Water System 2,082 409 -
Cheniere Drew South Water System 1,563 68 -
Frost Town Water System 1,551 26 -
L&r North Water System 1,293 269 -
Graphic Packaging International Inc - A 850 11 -
Graphic Packaging International Inc - B 850 10 -
Magnolia-Western Utilities, Inc 789 66 -
Lincoln Hills Subdivision WS 552 156 -
West Ouachita Ind Park 500 107 -
Hidden Oaks Subdivision WS 438 242 -
McClendon Community Water Well 336 130 -
International Paper - West Monroe 200 48 -
Bayou Boeuf RV Park Water System 100 4 -
Ramsey Water System 84 197 -
Pecan Lake Subdivision WS 57 181 -
Egret Landing Water System 42 3 -
Wildwood MHP WS 30 204 -

Compare beyond Louisiana

Mid-flagged peers for Ouachita Parish

Cross-state counties nearest Ouachita Parish on flagged-system share (93.5%) and cumulative violation count (4,888). 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.