Hardness
Moderately hard93 mg/L as CaCO₃
Annual average; range 70–126
USGS: moderately hard 61–120 mg/L
Scale-related measure; not a health limit.
2025View source
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Travis County Water Quality Report
Showing utility report
Austin Water
2025 report; each row keeps its measurement year
Results for Austin Water customers on system TX2270001. Other districts and private wells need their own reports.
Your water at a glance
See the amount, the comparison and what it means. “Below” refers to the stated benchmark, not zero risk.
Chloramines
Below stated benchmark2.3ppm
Distribution-system average; range 0.06–3.1
MRDL 4 ppm
Match treatment to chloramine rather than assuming a chlorine-only claim applies.
2025View source
TTHMs
Below limit45.5ppb
Highest locational running annual average; individual range 31.4–53.9
MCL 80 ppb, LRAA basis
2025View source
HAA5
Below limit15.6ppb
Highest locational running annual average; individual range 8.4–21.1
MCL 60 ppb, LRAA basis
2025View source
Fluoride
Below limit0.71ppm
Highest treatment-plant result; average 0.66, range 0.59–0.71
MCL 4 ppm
2025View source
Lead
Below action level<1.0ppb
90th-percentile tap sampling; no sample over 15 ppb
Report action level 15 ppb; MCLG 0
Not a guarantee for a particular home's plumbing.
2024View source
PFAS
Cannot assess high or lowNot verified
No compound-specific result assessed in this summary
This does not establish whether PFAS are present or absent. Check compound-specific testing before choosing treatment.
2025 report reviewView source
Nitrate
Below limit0.11ppm
Highest treatment-plant result; average 0.05, range 0–0.11
MCL 10 ppm
2025View source
Showing utility report
City of Round Rock
2025 report; each row keeps its measurement year
Results for City of Round Rock customers on system TX2460003. Other districts and private wells need their own reports.
Your water at a glance
See the amount, the comparison and what it means. “Below” refers to the stated benchmark, not zero risk.
Hardness
Very hard258mg/L
Results-table average; range 100–358
USGS very hard: over 180 mg/L as CaCO₃
Narrative separately says 249; use a home test for equipment settings.
2025View source
Chloramine
Below stated benchmark2.15ppm
Average; range 1.80–2.41
MRDL 4 ppm
2025View source
TTHMs
Below limit65ppb
Maximum LRAA; individual range 28.7–94.5
MCL 80 ppb, LRAA basis
A single result of 94.5 is not the annual compliance value.
2025View source
HAA5
Below limit21ppb
Maximum LRAA; individual range 6.8–36.2
MCL 60 ppb, LRAA basis
2025View source
Fluoride
Below limit0.21ppm
Reported high, low and average all 0.21
MCL 4 ppm
2025View source
Lead
Cannot assess high or lowNot verified
No verified lead number used in this summary
No result shown does not mean absent. Check the linked report or obtain relevant testing.
2025 report reviewView source
PFAS
Cannot assess high or lowNot verified
No compound-specific result assessed in this summary
This does not establish whether PFAS are present or absent. Check compound-specific testing before choosing treatment.
2025 report reviewView source
Nitrate
Below limit1.63ppm
Highest result; first results table range <0.25–1.63
MCL 10 ppm
2025View source
Your provider needs its own report.
Continue with your home details for general filtration guidance. We will not use another utility’s numbers as your result.
Find My Water System →Private well? Start with a current water test.
A city report cannot establish a well’s water quality. Well-water treatment depends on your test results and site conditions.
Explore well-water systems →Water hardness by provider
The figures below are provider-specific. They are not a countywide average.
| Utility | Hardness | Hardness source |
|---|---|---|
| 93 mg/L as CaCO₃ · Moderately hard · USGS: moderately hard 61–120 mg/L | 2025 | |
| 258 mg/L · Very hard · USGS very hard: over 180 mg/L as CaCO₃ | 2025 |
View Full Water ReportOpen the measured results, dates, comparisons and original utility report.
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 | 93 mg/L as CaCO₃ Annual average; range 70–126 | 2025View source ↗ | Moderately hard · USGS: moderately hard 61–120 mg/LScale-related measure; not a health limit. |
| Chloramines | 2.3 ppm Distribution-system average; range 0.06–3.1 | 2025View source ↗ | Below stated benchmark · MRDL 4 ppmMatch treatment to chloramine rather than assuming a chlorine-only claim applies. |
| Total trihalomethanes (TTHM) | 45.5 ppb Highest locational running annual average; individual range 31.4–53.9 | 2025View source ↗ | Below limit · MCL 80 ppb, LRAA basis |
| Haloacetic acids (HAA5) | 15.6 ppb Highest locational running annual average; individual range 8.4–21.1 | 2025View source ↗ | Below limit · MCL 60 ppb, LRAA basis |
| Fluoride | 0.71 ppm Highest treatment-plant result; average 0.66, range 0.59–0.71 | 2025View source ↗ | Below limit · MCL 4 ppm |
| Nitrate as nitrogen | 0.11 ppm Highest treatment-plant result; average 0.05, range 0–0.11 | 2025View source ↗ | Below limit · MCL 10 ppm |
| Lead | <1.0 ppb 90th-percentile tap sampling; no sample over 15 ppb | 2024View source ↗ | Below action level · Report action level 15 ppb; MCLG 0Not a guarantee for a particular home's plumbing. |
| Copper | <0.008 ppm 90th-percentile tap sampling; no sample over 1.3 ppm | 2024View source ↗ | Below action level · Action level 1.3 ppmA system sampling percentile is not a measurement of your faucet. |
| PFAS | Not verified No compound-specific result assessed in this summary | 2025 report reviewView source ↗ | Cannot assess high or lowThis does not establish whether PFAS are present or absent. Check compound-specific testing before choosing treatment. |
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 ↗
Turn your report into a plan for your home.
Choose the system size, keep useful existing equipment, and review your filtration goals.
Source water. Surface water from the Lower Colorado River through Lake Travis and Lake Austin, treated at Handcox, Davis and Ullrich plants.
View Full Water ReportOpen the measured results, dates, comparisons and original utility report.
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 | 258 mg/L Results-table average; range 100–358 | 2025View source ↗ | Very hard · USGS very hard: over 180 mg/L as CaCO₃Narrative separately says 249; use a home test for equipment settings. |
| Chloramine | 2.15 ppm Average; range 1.80–2.41 | 2025View source ↗ | Below stated benchmark · MRDL 4 ppm |
| Total trihalomethanes (TTHM) | 65 ppb Maximum LRAA; individual range 28.7–94.5 | 2025View source ↗ | Below limit · MCL 80 ppb, LRAA basisA single result of 94.5 is not the annual compliance value. |
| Haloacetic acids (HAA5) | 21 ppb Maximum LRAA; individual range 6.8–36.2 | 2025View source ↗ | Below limit · MCL 60 ppb, LRAA basis |
| Fluoride | 0.21 ppm Reported high, low and average all 0.21 | 2025View source ↗ | Below limit · MCL 4 ppm |
| Nitrate as nitrogen | 1.63 ppm Highest result; first results table range <0.25–1.63 | 2025View source ↗ | Below limit · MCL 10 ppm |
| Barium | 0.0545 ppm Highest result; range 0.0442–0.0545 | 2025View source ↗ | Below limit · MCL 2 ppm |
| Total dissolved solids | 302 ppm Reported high, low and average all 302 | 2025View source ↗ | Below reported secondary limit · Report secondary limit 1,000 ppmAn aesthetic benchmark, not a health or filtration performance claim. |
| Lead | Not verified No verified lead number used in this summary | 2025 report reviewView source ↗ | Cannot assess high or lowNo result shown does not mean absent. Check the linked report or obtain relevant testing. |
| PFAS | Not verified No compound-specific result assessed in this summary | 2025 report reviewView source ↗ | Cannot assess high or lowThis does not establish whether PFAS are present or absent. Check compound-specific testing before choosing treatment. |
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 ↗
Turn your report into a plan for your home.
Choose the system size, keep useful existing equipment, and review your filtration goals.
Source water. Lake Georgetown surface water, Edwards Aquifer groundwater and Lake Travis water treated by the Brushy Creek Regional Utility Authority.
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More about your local water
What this means for your home
Check the supplier before assuming very hard water.
Austin Water's lake-source measurements do not describe every Travis County MUD, neighboring utility or private well. This hub covers the listed retail systems only. The annual averages and current plant measurements shown are not individual tap tests.
Related city reports
A useful local question
Is all Travis County water very hard?
No. Austin Water's 2025 average was 93 mg/L as calcium carbonate, which is moderately hard. Round Rock's 2025 table reports a very hard average. The provider and source blend matter more than the county name.
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.
- Austin Water ↗2025 report; each row keeps its measurement year
- September 2026 treatment-plant summary ↗
- Austin Water · Hardness source ↗
- City of Round Rock ↗2025 report; each row keeps its measurement year
- USGS hardness classification
- EPA PFAS benchmarks and implementation
Sources checked October 23, 2026
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