Hardness
Moderately hard to hard120–155mg/L as CaCO₃ · published range
7.0–9.1 gpg. This older utility guidance is useful context, not a 2025 measurement or a test of your home.
December 2023 utility memo
View source ↗- 1Your water
- 2Your home
- 3Your system
Your local water, explained
Dallas County Water Quality Reports: Compare Providers
Four utilities. Separate results. A clearer starting point.
Dallas County water quality depends on the supplier. Compare Dallas, Irving, Garland and Grand Prairie reports here; the cities can share source water while reporting different results in their own distribution systems.
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Your water → your home → your system
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Your water
Match the name on your water bill.
The report follows your water provider—not your ZIP code or county boundary.
Only the listed water system is summarized here. Choose “Other / not sure” if your bill shows a different supplier.
Confirm the provider on your bill, or choose “Other / not sure” to continue without a matched report.
Utility data is a starting point. It is not a test of your tap or a live advisory. Sources checked October 22, 2026
Choose the right utility report
The figures below are provider-specific. They are not a countywide average.
| Utility | Hardness | Hardness source |
|---|---|---|
| Moderately hard to hard | December 2023 utility memo | |
| Not confirmed | 2025 report checked | |
| Moderately hard to very hard | 2025 measured range; FAQ average is undated | |
| Hard — older utility figure | 2022 utility report; older guidance |
Showing utility report
Dallas Water Utilities
2025 report; hardness from December 2023 memo
Dallas Water Utilities results apply to that supplier, not every city in Dallas County. Irving, Garland and Grand Prairie have separate distribution-system results.
Your water at a glance
See the amount, the comparison and what it means. “Below” refers to the stated benchmark, not zero risk.
Chloramine / total chlorine
Average below 4 ppm MRDL2.97ppm
Average total chlorine residual; range 2.75–3.18
2025
View source ↗TTHMs
Below 80 ppb MCL19.7ppb
Highest locational running annual average
2025
View source ↗HAA5
Below 60 ppb MCL15.1ppb
Highest locational running annual average
2025
View source ↗Fluoride
Below 4 ppm MCL0.686ppm
Maximum; average 0.627
2025
View source ↗Lead
Below 15 ppb action level1.1ppb
90th percentile; 0 sites over action level
An individual home may differ.
2024
View source ↗PFAS
Cannot assess high or lowNot quantified here
No compound-specific result used in this summary
Ask DWU for current PFAS monitoring.
2025 report
View source ↗Nitrate as nitrogen
Below 10 ppm MCL0.802ppm
Maximum; average 0.671
2025
View source ↗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 | 120–155 mg/L as CaCO₃ · published range | December 2023 utility memo | Moderately hard to hard7.0–9.1 gpg. This older utility guidance is useful context, not a 2025 measurement or a test of your home. |
| Chloramine / total chlorine | 2.97 ppmAverage total chlorine residual; range 2.75–3.18 | 2025 | Average below 4 ppm MRDL |
| TTHMs | 19.7 ppbHighest locational running annual average | 2025 | Below 80 ppb MCL |
| HAA5 | 15.1 ppbHighest locational running annual average | 2025 | Below 60 ppb MCL |
| Fluoride | 0.686 ppmMaximum; average 0.627 | 2025 | Below 4 ppm MCL |
| Lead | 1.1 ppb90th percentile; 0 sites over action level | 2024 | Below 15 ppb action levelAn individual home may differ. |
| PFAS | Not quantified here No compound-specific result used in this summary | 2025 report | Cannot assess high or lowAsk DWU for current PFAS monitoring. |
| Nitrate as nitrogen | 0.802 ppmMaximum; average 0.671 | 2025 | Below 10 ppm MCL |
| Barium | 0.038 ppmMaximum | 2025 | Below 2 ppm MCL |
| Copper | 0.39 ppm90th percentile | 2024 | Below 1.3 ppm action level |
| Cyanide | 76.8 ppbMaximum | 2025 | Below 200 ppb MCL |
| Atrazine | 0.10 ppbMaximum | 2025 | Below 3 ppb MCL |
| Turbidity | 0.16 NTUHighest single measurement | 2025 | Below 1 NTU single-measurement criterion |
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. Dallas uses surface water. Its treatment information identifies chloramine for distribution-system disinfection.
Showing utility report
City of Irving Water Utilities
2025 report; PFAS and lead samples from 2024
The report separates Dallas-supplied treated-water results from Irving’s own distribution and customer-tap results. The disinfectant, byproduct and lead numbers below use Irving’s results.
Your water at a glance
See the amount, the comparison and what it means. “Below” refers to the stated benchmark, not zero risk.
Hardness
Not confirmedTest at homeNo Irving hardness value verified here
We do not substitute Dallas’ hardness number for Irving. A current hardness test can establish whether scale treatment belongs in your system.
2025 report checked
View source ↗Chloramine
Average below 4 ppm MRDL2.84ppm
Average; range 0.54–3.98
2025
View source ↗TTHMs
Below 80 ppb MCL18ppb
Reported average LRAA; range 16–24
2025
View source ↗HAA5
Below 60 ppb MCL20ppb
Reported average LRAA; range 13–27
2025
View source ↗Fluoride
Below 4 ppm MCL0.686ppm
Dallas-supplied water maximum; average 0.627
2025
View source ↗Lead
Below 15 ppb action level1ppb
Irving tap-sample 90th percentile; 0 sites over AL
2024
View source ↗PFAS — PFOA
Some detections above 4 ppt EPA comparison4–5ppt
Range among detections; detected-only average 4
Historical samples; not a current compliance determination.
2024
View source ↗Nitrate as nitrogen
Below 10 ppm MCL0.802ppm
Dallas-supplied water maximum
2025
View source ↗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 | Test at home No Irving hardness value verified here | 2025 report checked | Not confirmedWe do not substitute Dallas’ hardness number for Irving. A current hardness test can establish whether scale treatment belongs in your system. |
| Chloramine | 2.84 ppmAverage; range 0.54–3.98 | 2025 | Average below 4 ppm MRDL |
| TTHMs | 18 ppbReported average LRAA; range 16–24 | 2025 | Below 80 ppb MCL |
| HAA5 | 20 ppbReported average LRAA; range 13–27 | 2025 | Below 60 ppb MCL |
| Fluoride | 0.686 ppmDallas-supplied water maximum; average 0.627 | 2025 | Below 4 ppm MCL |
| Lead | 1 ppbIrving tap-sample 90th percentile; 0 sites over AL | 2024 | Below 15 ppb action level |
| PFAS — PFOA | 4–5 pptRange among detections; detected-only average 4 | 2024 | Some detections above 4 ppt EPA comparisonHistorical samples; not a current compliance determination. |
| Nitrate as nitrogen | 0.802 ppmDallas-supplied water maximum | 2025 | Below 10 ppm MCL |
| PFAS — PFOS | 4 pptDetected-only average and detected range | 2024 | At 4 ppt EPA comparisonNondetects excluded from the reported average. |
| PFAS — PFBS | 5 pptDetected-only average; range 4–6 | 2024 | No individual federal MCL for this compoundDo not compare this amount with the PFOA/PFOS limits. |
| Copper | 0.272 ppmIrving tap-sample 90th percentile | 2024 | Below 1.3 ppm action level |
| Barium | 0.038 ppmDallas-supplied water maximum | 2025 | Below 2 ppm MCL |
| E. coli | 0 positive samplesIrving distribution monitoring | 2025 | No positive samples reportedThis is historical utility monitoring, not a home test. |
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. Irving’s water-report tables distinguish the purchased treated-water supply from water sampled in the Irving distribution system. That distinction changes which result belongs on your city page.
Showing utility report
City of Garland Water Utilities
2025 report; PFAS samples from 2024
Garland purchases treated water from North Texas Municipal Water District. This page uses Garland’s own 2025 report, including local distribution and tap samples.
Your water at a glance
See the amount, the comparison and what it means. “Below” refers to the stated benchmark, not zero risk.
Hardness
Moderately hard to very hard96–200mg/L as CaCO₃ · reported range
5.6–11.7 gpg. Garland’s separate FAQ describes a typical average of 161 mg/L (9.4 gpg), classified as hard.
2025 measured range; FAQ average is undated
View source ↗Chloramine
Average below 4 ppm MRDL2.48ppm
Average; range 0.5–4.2
2025
View source ↗TTHMs
Below 80 ppb MCL72.3ppb
Reported highest level; range 21.7–72.3
The report marks no violation; the MCL uses an annual averaging basis.
2025
View source ↗HAA5
Below 60 ppb MCL35.7ppb
Reported highest level; range 16.5–35.7
2025
View source ↗Fluoride
Below 4 ppm MCL0.492ppm
Maximum; range 0.352–0.492
2025
View source ↗Lead
Below 15 ppb action level1.22ppb
90th percentile; 0 sites over action level
2025
View source ↗PFAS — PFBA
No individual federal MCL for this compound8.9ppt
Average; range 6.5–12 (converted from µg/L)
Detected does not create a universal high/low PFAS score.
2024
View source ↗Nitrate as nitrogen
Below 10 ppm MCL0.866ppm
Maximum
2025
View source ↗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 | 96–200 mg/L as CaCO₃ · reported range | 2025 measured range; FAQ average is undated | Moderately hard to very hard5.6–11.7 gpg. Garland’s separate FAQ describes a typical average of 161 mg/L (9.4 gpg), classified as hard. |
| Chloramine | 2.48 ppmAverage; range 0.5–4.2 | 2025 | Average below 4 ppm MRDL |
| TTHMs | 72.3 ppbReported highest level; range 21.7–72.3 | 2025 | Below 80 ppb MCLThe report marks no violation; the MCL uses an annual averaging basis. |
| HAA5 | 35.7 ppbReported highest level; range 16.5–35.7 | 2025 | Below 60 ppb MCL |
| Fluoride | 0.492 ppmMaximum; range 0.352–0.492 | 2025 | Below 4 ppm MCL |
| Lead | 1.22 ppb90th percentile; 0 sites over action level | 2025 | Below 15 ppb action level |
| PFAS — PFBA | 8.9 pptAverage; range 6.5–12 (converted from µg/L) | 2024 | No individual federal MCL for this compoundDetected does not create a universal high/low PFAS score. |
| Nitrate as nitrogen | 0.866 ppmMaximum | 2025 | Below 10 ppm MCL |
| PFAS — PFBS | 4.75 pptAverage; range 3.8–5.7 (converted from µg/L) | 2024 | No individual federal MCL for this compound |
| PFAS — PFHxA | 4.975 pptAverage; range 3.4–7.5 (converted from µg/L) | 2024 | No individual federal MCL for this compound |
| PFAS — PFPeA | 5.525 pptAverage; range 3.7–8.6 (converted from µg/L) | 2024 | No individual federal MCL for this compound |
| Copper | 1.000 ppm90th percentile | 2025 | Below 1.3 ppm action level |
| Total dissolved solids | 455 ppmMaximum; range 182–455 | 2025 | Below 500 ppm aesthetic guideline |
| Arsenic | 1 ppbReported highest level | 2025 | Below 10 ppb MCL |
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. Garland buys treated surface water from NTMWD. Its utility FAQ identifies chloramine disinfection; the report also includes chlorine dioxide measurements.
Showing utility report
City of Grand Prairie
2025 report; 2024 PFAS/lead; 2022 hardness guidance
Grand Prairie extends into Dallas, Tarrant and Ellis counties. This city-specific utility report follows the supplier on your bill rather than assigning Dallas Water Utilities’ results to every address.
Your water at a glance
See the amount, the comparison and what it means. “Below” refers to the stated benchmark, not zero risk.
Hardness
Hard — older utility figure170ppm as CaCO₃ · 2022 guidance
Approximately 9.9 grains per gallon. This historical figure is not a 2025 measurement; confirm today’s hardness before selecting or programming a softener.
2022 utility report; older guidance
View source ↗Chloramine
Average below 4 ppm MRDL2.95ppm
Average; range 0.60–4.70
2025
View source ↗TTHMs
Below 80 ppb MCL44.7ppb
Highest locational annual average
2025
View source ↗HAA5
Below 60 ppb MCL30.3ppb
Highest locational annual average
2025
View source ↗Fluoride
No single citywide high/low valueVaries by supplier
Purchased-water tables; not one citywide tap value
See the utility’s supplier tables; do not average different systems.
2025 report
View source ↗Lead
System percentile below AL; some taps above1.2ppb
90th percentile; 3 of 50 sites over 15 ppb
Maximum sample: 75.1 ppb. Check home plumbing and test your tap.
2024
View source ↗PFAS — PFOS
Above 4 ppt EPA comparison20ppt
Reported average; range 4.1–82
Historical monitoring, not a current compliance determination.
2024
View source ↗Nitrate as nitrogen
Below 10 ppm MCL1.15ppm
Maximum; range 0.034–1.15
2025
View source ↗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 | 170 ppm as CaCO₃ · 2022 guidance | 2022 utility report; older guidance | Hard — older utility figureApproximately 9.9 grains per gallon. This historical figure is not a 2025 measurement; confirm today’s hardness before selecting or programming a softener. |
| Chloramine | 2.95 ppmAverage; range 0.60–4.70 | 2025 | Average below 4 ppm MRDL |
| TTHMs | 44.7 ppbHighest locational annual average | 2025 | Below 80 ppb MCL |
| HAA5 | 30.3 ppbHighest locational annual average | 2025 | Below 60 ppb MCL |
| Fluoride | Varies by supplier Purchased-water tables; not one citywide tap value | 2025 report | No single citywide high/low valueSee the utility’s supplier tables; do not average different systems. |
| Lead | 1.2 ppb90th percentile; 3 of 50 sites over 15 ppb | 2024 | System percentile below AL; some taps aboveMaximum sample: 75.1 ppb. Check home plumbing and test your tap. |
| PFAS — PFOS | 20 pptReported average; range 4.1–82 | 2024 | Above 4 ppt EPA comparisonHistorical monitoring, not a current compliance determination. |
| Nitrate as nitrogen | 1.15 ppmMaximum; range 0.034–1.15 | 2025 | Below 10 ppm MCL |
| PFAS — PFOA | 4.5 pptReported average; range 4.1–4.9 | 2024 | Above 4 ppt EPA comparisonCheck current results and exact treatment claims. |
| PFAS — PFHxS | 3.3 pptReported average; detected range 3.3–3.3 | 2024 | Compound-specific review neededFederal PFAS rule changes are being considered; see EPA. |
| Copper | 0.253 ppm90th percentile; 0 sites over action level | 2024 | Below 1.3 ppm action level |
| Nitrite | 0.374 ppmReported maximum | 2024 | Below 1 ppm MCL |
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. Grand Prairie buys treated water from multiple suppliers and may use groundwater wells as demand requires. Use Grand Prairie distribution results for disinfectants and byproducts.
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.
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More about your local water
What this means for your home
Use the comparison below to choose the right report, not to rank all Dallas County water with one score. Garland’s measured hardness range, Irving’s detected-only PFAS averages and Grand Prairie’s sampled lead exceedances each need different context.
Related city reports
Dallas
Current contaminant results. Clearly dated hardness guidance.
Browse reports →Irving
Use Irving’s local results, not a neighboring city’s average.
Browse reports →Garland
A measured hardness range, with a practical scale-control plan.
Browse reports →Grand Prairie
A city-specific report across county boundaries.
Browse reports →A useful local question
Can I use Dallas city results for every home in Dallas County?
No. Select the supplier on your water bill. This guide keeps each utility’s distribution and tap results separate, even where a city purchases treated water from Dallas.
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.
- Dallas Water Utilities ↗2025 report; hardness from December 2023 memo
- Dallas Water Utilities · Hardness source ↗
- City of Irving Water Utilities ↗2025 report; PFAS and lead samples from 2024
- City of Garland Water Utilities ↗2025 report; PFAS samples from 2024
- City of Grand Prairie ↗2025 report; 2024 PFAS/lead; 2022 hardness guidance
- City of Grand Prairie · Hardness source ↗
- USGS hardness classification
- EPA PFAS benchmarks and implementation
Sources checked October 22, 2026
Your water → your home → your system
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Choose the system size, keep useful existing equipment, and review your filtration goals.
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