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City water profile

Water hardness in Costilla

Find official utility reports, understand hardness, and check the water system serving your home in Costilla, New Mexico.

Utility-reported hardness

Not yet available

Check your provider and source →
State comparison
Unavailable
Evidence comparison rank
—
Matched utilities
1
Active health records
6

Your tap water

What does the utility report?

Match the utility name to your water bill. These results describe the utility’s water, not a test at your home. A ZIP can include several water systems.

Utility hardness unavailable in this index

Nearby river or groundwater samples cannot tell us the hardness coming out of your tap. Ask your water provider for total hardness as CaCO₃, or test it at home.

Find an official utility report →
Convert a hardness result →Test your tap →

Match the name on your water bill

Your utility’s measurements and compliance records

These are possible serving systems. A record for one system does not apply to every home in this ZIP. Confirm your provider before interpreting a measurement or notice. Federal records can lag current utility notices.

EPA snapshot: 2026Q2. Historical window begins Jan 1, 2021.

Costilla Mdwca

NM3505929 · Groundwater · 244 people served system-wide

The system names this served city; Census place overlap links the city to this ZCTA.

6 reported active health-based record(s) for this system

Find this utility’s official report →
Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level
Reported level
0.002 mg/L
Action level
0.015 mg/L

13% of the listed benchmark

Monitoring period: Jan 1, 2020 to Dec 31, 2022

Violation history (21)
Imported violation history for Costilla Mdwca
RuleStatusPeriod
Revised Total Coliform RuleArchivedMar 1, 2026 to Mar 31, 2026
Consumer Confidence RuleResolvedJul 1, 2025 to Aug 1, 2025
Public NoticeUnaddressedMar 7, 2025
LEAD AND COPPER RULE REVISIONSHealth-basedAddressedOct 17, 2024
LEAD AND COPPER RULE REVISIONSAddressedOct 17, 2024
Groundwater RuleHealth-basedUnaddressedJul 3, 2024
Groundwater RuleHealth-basedUnaddressedJul 3, 2024
Groundwater RuleHealth-basedUnaddressedJul 3, 2024
Groundwater RuleHealth-basedUnaddressedJul 3, 2024
Groundwater RuleUnaddressedApr 7, 2024
Consumer Confidence RuleResolvedOct 1, 2023 to Nov 27, 2023
Consumer Confidence RuleResolvedJul 1, 2023 to Nov 27, 2023
Public NoticeResolvedDec 31, 2021 to Mar 2, 2022
Public NoticeResolvedDec 19, 2021 to Mar 2, 2022
Public NoticeResolvedOct 24, 2021 to Mar 2, 2022
Public NoticeResolvedOct 6, 2021 to Dec 1, 2025
Consumer Confidence RuleResolvedOct 1, 2021 to Mar 2, 2022
Consumer Confidence RuleResolvedJul 1, 2021 to Feb 22, 2022
ChlorineResolvedJan 1, 2021 to Mar 31, 2021
Groundwater RuleHealth-basedUnaddressedOct 17, 2012
Consumer Confidence RuleUnaddressedJul 1, 2002

City summary

What the indexed records say

Costilla has 1 published ZIP profile across Taos County. The regional-evidence median is 174 PPM. The city does not meet the stricter comparison standard.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard0 ZIPs
Hard1 ZIP
Very hard0 ZIPs

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
6 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Oct 25, 2016 to Aug 10, 2021.

ZIP directory

Water reports in Costilla

Open a ZIP for site-level provenance and measurements.

ZIP code

87524

Hard

174 PPM

Nearest site
6 mi
Confidence
Moderate

View full ZIP evidence →

Practical next steps

Move from index to evidence

  1. 1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
  2. 2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
  3. 3. Use a measured hardness result. Confirm health concerns or treatment sizing with the right method.

Questions people ask

About water in Costilla

Is the water hard?

Check the utility-reported result above when available. Nearby environmental samples cannot establish tap-water hardness. Ask your provider or test your tap.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.