Tap Water Quality Report
Tap water quality in RIO RANCHO, New Mexico
Tap water in RIO RANCHO, New Mexico receives a grade of F (59/100) from TapWaterSafety.org. It's served by RIO RANCHO WATER & WW SERVICES. The most significant water quality concerns are: Arsenic significantly above health guideline; Chromium (hexavalent) significantly above health guideline; Dibromoacetic acid significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in RIO RANCHO's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving RIO RANCHO.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 8.08 ppb, 2019x above the EWG health guideline of 0.004 ppb.
Chromium (hexavalent) significantly above health guideline
Moderate concernChromium (hexavalent) detected at 4.4 ppb, 220x above the EWG health guideline of 0.02 ppb.
Dibromoacetic acid significantly above health guideline
Moderate concernDibromoacetic acid detected at 1.54 ppb, 51x above the EWG health guideline of 0.03 ppb.
EPA compliance record
Official U.S. EPA records for RIO RANCHO WATER & WW SERVICES (system ID NM3509623) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Public Notice Rule and Revised PN Rule | Other (e.g. public notice) | 01/28/2011 | Open |
| Ground Water Rule | Required treatment not met | 03/23/2026 | Open |
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Recommended filters for RIO RANCHO
Filters matched to the specific contaminants in RIO RANCHO's water supply.
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All contaminants detected in RIO RANCHO's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Arsenic Heavy metal |
8.08 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 2019× over |
| Chromium (hexavalent) Heavy metal |
4.4 ppb | 0.02 | — | — | — | — | — | 220× over |
| Dibromoacetic acid Disinfection byproduct |
1.54 ppb | 0.03 | — | — | — | — | — | 51× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
7.72 ppb | 0.15 | 80.0 | 100 | — | — | — | 51× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
2.7 ppb | 0.1 | 60.0 | 60 | — | — | — | 27× over |
| Dibromochloromethane Disinfection byproduct |
1.96 ppb | 0.1 | — | — | — | — | — | 20× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
0.755 ppb | 0.06 | — | — | — | — | — | 13× over |
| Bromoform Disinfection byproduct |
5.3 ppb | 0.5 | — | — | — | — | — | 11× over |
| Nitrate and nitrite Inorganic |
1.3 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 9.3× over |
| Uranium Radiological |
2.93 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 6.8× over |
| Bromodichloromethane Disinfection byproduct |
0.378 ppb | 0.06 | — | — | — | — | — | 6.3× over |
| Radium, combined (-226 and -228) Radiological |
0.14 pCi/L | 0.05 | 5.0 | — | — | — | — | 2.8× over |
| Dichloroacetic acid Disinfection byproduct |
0.53 ppb | 0.2 | — | — | — | — | — | 2.7× over |
| Vanadium Other |
17.3 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Trichloroacetic acid Disinfection byproduct |
0.05 ppb | 0.1 | — | — | — | — | — | Below guideline |
| Chloroform Disinfection byproduct |
0.0967 ppb | 0.4 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
5.13 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
55.4 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Chlorate Disinfection byproduct |
11.9 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.34 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.267 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
0.467 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Strontium Radiological |
0.674 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
4.63 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.737 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Germanium Other |
0.671 ppb | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from RIO RANCHO WATER & WW SERVICES.