Water Quality Report · Updated May 12, 2026
JOHNSON COUNTY SUD
JOHNSON COUNTY SUD delivers tap water graded C (67/100) by TapWaterSafety.org. The utility serves approximately 65,517 residents in JOSHUA, Texas using surface water (purchased). The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Bromochloroacetic acid significantly above health guideline; Arsenic detected. For questions, the utility can be reached at 817-760-5200.
Is JOSHUA tap water safe to drink?
JOHNSON COUNTY SUD delivers tap water that earns a grade of C (67/100) from TapWaterSafety.org — an average rating, with several contaminants above health guidelines but generally compliant with US legal limits.
The utility serves 65,517 residents in JOSHUA, drawing from surface water (purchased).
Public testing data identifies 16 contaminants in this water above EWG's health-based guidelines, including: Haloacetic acids (HAA9), Total trihalomethanes (TTHMs), Bromochloroacetic acid, Bromodichloromethane, Haloacetic acids (HAA5), Dibromoacetic acid, Dibromochloromethane, Arsenic, Dichloroacetic acid, Trichloroacetic acid, Chloroform, Bromoform, Radium, combined (-226 and -228), Nitrate, Nitrate and nitrite, Chromium (hexavalent). 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.
Quick actions for JOSHUA residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for JOHNSON COUNTY SUD.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 21.8 ppb, 363x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 29.1 ppb, 194x above the EWG health guideline of 0.15 ppb.
Bromochloroacetic acid significantly above health guideline
Moderate concernBromochloroacetic acid detected at 3.84 ppb, 192x above the EWG health guideline of 0.02 ppb.
Arsenic detected
Moderate concernArsenic detected at 0.13 ppb.
Contact JOHNSON COUNTY SUD
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 JOSHUA
Filters matched to the specific contaminants in this water supply.
Carbon block (NSF/ANSI 42 + 53)
$40-$750Activated carbon is highly effective for disinfection byproducts like TTHM and HAA5.
Reverse Osmosis
$249-$750Arsenic is most effectively removed by reverse osmosis. Some specialized adsorptive filters also work.
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 67/100 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 |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
21.8 ppb | 0.06 | — | — | — | — | — | 363× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
29.1 ppb | 0.15 | 80.0 | 100 | — | — | — | 194× over |
| Bromochloroacetic acid Disinfection byproduct |
3.84 ppb | 0.02 | — | — | — | — | — | 192× over |
| Bromodichloromethane Disinfection byproduct |
6.78 ppb | 0.06 | — | — | — | — | — | 113× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
11.1 ppb | 0.1 | 60.0 | 60 | — | — | — | 111× over |
| Dibromoacetic acid Disinfection byproduct |
2.28 ppb | 0.03 | — | — | — | — | — | 76× over |
| Dibromochloromethane Disinfection byproduct |
6.17 ppb | 0.1 | — | — | — | — | — | 62× over |
| Arsenic Heavy metal |
0.13 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 33× over |
| Dichloroacetic acid Disinfection byproduct |
5.67 ppb | 0.2 | — | — | — | — | — | 28× over |
| Trichloroacetic acid Disinfection byproduct |
2.33 ppb | 0.1 | — | — | — | — | — | 23× over |
| Chloroform Disinfection byproduct |
6.31 ppb | 0.4 | — | — | — | — | — | 16× over |
| Bromoform Disinfection byproduct |
2.94 ppb | 0.5 | — | — | — | — | — | 5.9× over |
| Radium, combined (-226 and -228) Radiological |
0.15 pCi/L | 0.05 | 5.0 | — | — | — | — | 3.0× over |
| Nitrate Inorganic |
0.178 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 1.3× over |
| Nitrate and nitrite Inorganic |
0.169 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 1.2× over |
| Chromium (hexavalent) Heavy metal |
0.0218 ppb | 0.02 | — | — | — | — | — | 1.1× over |
| Chlorate Disinfection byproduct |
100.4 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Bromochloromethane Other |
0.0112 ppb | 0.06 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
41.8 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Atrazine Pesticide/Herbicide |
0.00588 ppb | 0.1 | 3.0 | 0.1 | 100 | 0.15 | — | Below guideline |
| Molybdenum Other |
1.29 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
1.3 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.303 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.236 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.552 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Aluminum Heavy metal |
2.07 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
2.94 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
1.53 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
1.45 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Xylenes (total) Volatile organic compound |
2.08 ppb | 1800.0 | 10000.0 | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
0.717 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.298 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| 1-Butanol Other |
0.46 ppb | — | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
1.11 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Cyanide Inorganic |
4.88 ppb | — | 200.0 | 50 | 70 | 150 | — | Below guideline |
| Fluoride Inorganic |
0.961 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Germanium Other |
0.183 ppb | — | — | — | — | — | — | Below guideline |
| Lithium Other |
25.2 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.
JOHNSON COUNTY SUD service area
This water system serves 1 community in Johnson County, Texas. Click any city for its dedicated tap water quality page.
Find the right filter for JOSHUA water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.