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Counties → New Mexico

Rio Arriba County, New Mexico

SDWIS compliance plate

Sheet NM039 · Rio Arriba County 63 sys · 14,535 viol · #1389/3254

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

  • VIOL-SEVERE 98.4% flagged
  • HEALTH-MID 23.7% health
  • RANK-MID #1389/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 89%
  • SYS-MID 63 systems
  • BOOK-FULL 7/7 fields

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

According to EPA SDWIS county population served used on /counties, Rio Arriba County ranks #1,389 of 3,254 counties by people served, and #14 of 33 counties in New Mexico. See methodology · corpus placement.

Rio Arriba County standing, mid-flagged corpus third

Flagged-system rate 98.4% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 23.7% is health-based share in the middle 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 #1,389 of 3,254 · #14 of 33 in New Mexico.

Flagged-rate neighbourhood around Rio Arriba County

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

0% 20% 40% 60% 80% 100% Colfax · lowest Rio Arriba · this county Taos · near Dona Ana · near 63.5% 98.1% 98.4% 98.4% 98.9% 100% 100%

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

Water Systems

System Name Population Violations PFAS
Espanola Water System 12,012 694 Clean
Chama Water System 1,573 425 -
Agua Sana Wua 1,514 446 -
El Rito Regional Water & Waste Water Asn 1,200 63 -
Greater Chimayo Mdwca 1,050 73 -
Alcalde Mdwca 927 215 -
Chamita Mdwca 902 183 -
Truchas Mdwca 629 140 -
Velarde Mdwca 543 80 -
Dixon Mdwca 500 81 -
Tierra Amarilla Mdwca 470 199 -
Canjilon Water System 469 139 -
Abiquiu Mdwca 420 529 -
Brazos Mdwca 360 116 -
Bpoe 1747 Recreation Area 357 122 -
Cebolla Mdwca 350 483 -
Cordova Mdwca 325 264 -
Ensenada Mdwca 300 208 -
El Rito Canyon Mdwca 300 328 -
Coronado High School 263 143 -
Chimayo Elementary School 250 86 -
Los Ojos Mdwca 237 373 -
Ojo Sarco Mdwca 225 107 -
Escalante High School 225 106 -
Lumberton Mdwca 223 1,277 -
Capulin Mdwca 215 467 -
Echo Amphitheater Usfs Carson 205 38 -
Valley Estates Water & Sewer Association 194 539 -
Abiquiu Inn 191 103 -
Lybrook Mdwca 175 231 -
Rio Embudo Mdwca 159 335 -
Canones Mdwca 150 269 -
Ghost Ranch Conference Center 150 119 -
Heron Lake State Park (Surface Water) 150 140 -
Apodaca Mdwca 129 52 -
Rio Arriba County Detention Center 128 57 -
Abiquiu Elementary School 125 100 -
La Madera Mdwca 124 242 Clean
Navajo Lake State Park - Sims Mesa 110 113 -
Abiquiu Dam 100 34 -
El Vado Lake State Park 100 151 -
Gallina Water System 99 327 -
Barranco Mdwca 97 514 -
Rutheron Mutual Water Association 90 234 -
Chama West Water Users Association 90 54 -
Lindrith Community Water Coop Inc 85 158 -
Vallecitos Mdwca 84 553 -
Delancey Street Foundation 83 232 -
Coyote Mdwca 77 229 -
McCurdy School 62 181 -

Compare beyond New Mexico

Mid-flagged peers for Rio Arriba County

Cross-state counties nearest Rio Arriba County on flagged-system share (98.4%) and cumulative violation count (14,535). 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.