Hardness
Hard average169mg/L as CaCO₃
Utility-reported average; range 81–244
USGS hardness category
About 9.9 grains per gallon. Confirm incoming hardness for softener sizing.
2025View source
- 1Your water
- 2Your home
- 3Your system
Lubbock County Water Quality Report
Showing utility report
City of Lubbock
2025 report; each result retains its sampling period
Results for City of Lubbock (TX1520002) within Lubbock County. Other suppliers and private wells require their own reports or tests.
Your water at a glance
See the amount, the comparison and what it means. “Below” refers to the stated benchmark, not zero risk.
Total chlorine
Reported level below MRDL3.511mg/L
Average; range 2.07–4.63
MRDL 4 mg/L
Total includes free and combined chlorine. Monochloramine is the secondary disinfectant.
2025View source
TTHMs
Below report benchmark17µg/L
Running annual average; range 8–36
MCL 80 µg/L
2025View source
HAA5
Below report benchmark7.84µg/L
Running annual average; range 2.50–13.0
MCL 60 µg/L
2025View source
Fluoride
Below report benchmark0.741mg/L
Average; range 0.635–0.846
MCL 4 mg/L
2025View source
Lead
90th percentile below action level1.36µg/L
90th percentile; range 0–9.16
Action level 15 µg/L
2023–2025View source
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The figures below are provider-specific. They are not a countywide average.
| Utility | Hardness | Hardness source |
|---|---|---|
| 169 mg/L as CaCO₃ · Hard average | 2025 |
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The numbers behind your report
Selected useful results—not a replacement for the utility’s complete report. Older measurements retain their original year.
Open the complete utility report ↗
| What was measured | Reported amount | Sample year / source date | How to read it |
|---|---|---|---|
| Hardness | 169 mg/L as CaCO₃Utility-reported average; range 81–244 | 2025View source ↗ | Hard average · USGS hardness categoryAbout 9.9 grains per gallon. Confirm incoming hardness for softener sizing. |
| Total chlorine | 3.511 mg/LAverage; range 2.07–4.63 | 2025View source ↗ | Reported level below MRDL · MRDL 4 mg/LTotal includes free and combined chlorine. Monochloramine is the secondary disinfectant. |
| TTHMs | 17 µg/LRunning annual average; range 8–36 | 2025View source ↗ | Below report benchmark · MCL 80 µg/L |
| HAA5 | 7.84 µg/LRunning annual average; range 2.50–13.0 | 2025View source ↗ | Below report benchmark · MCL 60 µg/L |
| Fluoride | 0.741 mg/LAverage; range 0.635–0.846 | 2025View source ↗ | Below report benchmark · MCL 4 mg/L |
| Lead | 1.36 µg/L90th percentile; range 0–9.16 | 2023–2025View source ↗ | 90th percentile below action level · Action level 15 µg/L |
| Copper | 0.142 mg/L90th percentile; range 0.00868–0.27 | 2023–2025View source ↗ | 90th percentile below action level · Action level 1.3 mg/L |
| Arsenic | 2.7 µg/LAverage; range 1.4–4.6 | 2025View source ↗ | Below report benchmark · MCL 10 µg/L |
| PFAS | Not assessed No complete compound-specific assessment in this guide | Report review: November 2026View source ↗ | No presence or absence conclusion · Separate testing neededThis guide does not classify PFAS as high, low or absent. Consult the original report and compound-specific data. |
ppm ≈ mg/L; ppb ≈ µg/L; ppt ≈ ng/L in drinking water. Hardness in gpg = mg/L as CaCO₃ ÷ 17.1. ND means not detected at the method’s reporting limit—not zero.
MCL is a maximum contaminant level. MRDL is a disinfectant limit. Lead/copper action levels use system sampling percentiles and are not a safe-tap threshold. TTHM/HAA5 compliance uses locational annual averages.
PFOA/PFOS comparisons use EPA’s 4 ppt values. Historical detections are not a present compliance finding; EPA assesses compliance using running annual averages. Rule implementation is being reviewed. EPA PFAS benchmarks and implementation ↗
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Source water. A 2025 supply mix of 61% Ogallala groundwater from the Roberts County and Bailey County wellfields and 39% surface water from Lakes Alan Henry and Meredith.
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What this means for your home
Lubbock’s changing groundwater and surface-water blend produces a broad hardness range.
The 2025 report gives average hardness of 169 mg/L and a range of 81–244 mg/L. The average is hard, but individual supply measurements span moderately hard through very hard. Total chlorine includes free and combined chlorine; the report identifies monochloramine as the secondary disinfectant.
A useful local question
Why can Lubbock hardness change during the year?
Lubbock blends groundwater and surface water, which carry different mineral levels. The utility reports 81–244 mg/L in 2025. Use the current incoming level at your home to set a softener, rather than assuming the annual average applies every day.
Sources and methodology
We keep each utility’s results separate, show the reported sample year, and distinguish averages, maxima and tap-sampling percentiles. Hardness classifications use USGS ranges. Missing data stays unknown.
- City of Lubbock ↗2025 report; each result retains its sampling period
- USGS hardness classification
- EPA PFAS benchmarks and implementation
Sources checked November 14, 2026
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