Water Quality Report · Updated October 07, 2026
RIO RANCHO WATER & WW SERVICES
RIO RANCHO WATER & WW SERVICES delivers tap water graded D (59/100) by TapWaterSafety.org. The utility serves approximately 107,350 residents in RIO RANCHO, New Mexico using surface water (purchased). The most significant water quality concerns are: Arsenic significantly above health guideline; Chromium (hexavalent) significantly above health guideline; Dibromoacetic acid significantly above health guideline. For questions, the utility can be reached at 505-896-8812.
Is RIO RANCHO tap water safe to drink?
RIO RANCHO WATER & WW SERVICES delivers tap water that earns a grade of D (59/100) from TapWaterSafety.org — a below-average rating, with multiple concerns including arsenic significantly above health guideline.
The utility serves 107,350 residents in RIO RANCHO, drawing from surface water (purchased).
Public testing data identifies 13 contaminants in this water above EWG's health-based guidelines, including: Arsenic, Chromium (hexavalent), Dibromoacetic acid, Total trihalomethanes (TTHMs), Haloacetic acids (HAA5), Dibromochloromethane, Haloacetic acids (HAA9), Bromoform, Nitrate and nitrite, Uranium, Bromodichloromethane, Radium, combined (-226 and -228), Dichloroacetic acid. For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
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.
Quick actions for RIO RANCHO residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for RIO RANCHO WATER & WW SERVICES.
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.
Contact RIO RANCHO WATER & WW SERVICES
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for RIO RANCHO
Filters matched to the specific contaminants in this water supply.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 59/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). 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 (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
RIO RANCHO WATER & WW SERVICES service area
This water system serves 1 community in Sandoval County, New Mexico. Click any city for its dedicated tap water quality page.
Find the right filter for RIO RANCHO water
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