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Is Rockville, VA Tap Water Safe to Drink?

Graded F — but Copper and Chlorate were detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓

72K residents served 165 water systems PWSID: VA2065480
Overall Score
39.7 / 100
Violations
257 active
Last Updated
May 2026
Source
Surface water
#226 of 230 in Virginia Top 97% nationally
Private
High data confidence
Reviewed by WaterVerge Editorial Team · Last updated May 2026
FGRADE
Water Quality Grade
39.7/100
waterverge.com
F 39.7/100

Rockville, VA — Water Quality Report

Rockville's drinking water received a grade of F (39.7 out of 100), indicating failing water quality. The city's 165 water systems serve approximately 72,337 residents using surface water.

Lead levels were measured at 0.0 ppb (90th percentile), well within EPA limits. UCMR 5 testing detected 4 PFAS compounds in the water supply.

The system has 1898 violations on record, including 384 health-based violations. 257 remain unresolved.

Data last updated: May 2026 · Source: EPA SDWIS, UCMR 5
Step 1 See the 12 contaminants we flagged Measured levels for Lead and Copper vs. EPA limits. Step 2 Best filter for pfas Reverse Osmosis or Activated Carbon Block — our tested picks for removing pfas. Step 3 How Rockville compares Rockville scores below nearby cities (avg 85/100).
Analysis

What to know about Rockville's water

Rockville ranks #226 out of 230 cities in Virginia for water quality, placing it among the lowest-rated in the state.

The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection.

PFAS compounds were detected in testing, though levels remain within current EPA limits. Residents seeking extra precaution may consider an activated carbon or reverse osmosis filter.

Hexavalent chromium (chromium-6) was detected at 0.04 µg/L in UCMR 3 testing. While below California's 10 µg/L limit and with no federal MCL set, residents sensitive to this contaminant may consider reverse osmosis filtration.

The system has seen 11 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.

Quality Breakdown

Water quality score

See methodology →
39.7 out of 100 Grade F
A: 90-100
B: 74-89
C: 60-73
F: <50
How is this calculated?
Violations
0/45
F
Historical violation record including health-based and monitoring violations.
Lead & Copper
16/20
B
Lead at 0.0 ppb (90th percentile).
Contaminants
11.7/20
D
4 PFAS compounds detected.
Compliance
8/10
B
Monitoring and reporting compliance with EPA regulations.
Source Risk
4/5
B
Water source: Surface water.
Water Safety

Is Rockville, VA water safe to drink?

Concerns Identified

Rockville's drinking water has significant quality concerns based on EPA testing data. With a grade of F (39.7/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 165 water systems serve approximately 72,337 residents using surface water (rivers, lakes, or reservoirs).

257
Active Violations
0.0 ppb
Lead (90th %ile)
4 compounds
PFAS Detected
6 events
Disaster History

Recent water quality updates for Rockville

A timeline of significant water quality events, violations, and data updates.

PFAS
4 PFAS "forever chemical" compounds detected

Detected at levels within current EPA limits. PFAS persist indefinitely in the environment.

Update
Water quality data updated

Latest EPA compliance and testing data incorporated into Rockville's water quality assessment. Grade: F (39.7/100).

Violation
1 drinking water violation recorded

Contaminants: Chlorine.

Violation
2 drinking water violations recorded

Contaminants: Revised Total Coliform Rule, Chlorine.

Violation
1 drinking water violation recorded

Contaminants: Revised Total Coliform Rule.

Disaster
HURRICANE FLORENCE

Federal disaster declaration (FEMA DR-3403). Hurricane event — may have impacted local water infrastructure.

Key contaminant findings

Based on the most recent EPA sampling data for Rockville's water supply.

Lead Within Limits
Detected: 0.0 ppb Limit: 15 ppb (EPA Action Level)

Well within EPA limits.

Copper Exceeds Limit
Detected: 6.00 mg/L Limit: 1.3 mg/L (EPA Action Level)

Exceeds EPA action level. Copper can leach from household plumbing — flush taps for 30 seconds before drinking.

PFAS (4 compounds) Elevated
Detected: Highest: lithium at 14.0000 µg/L Limit: 0.004 µg/L (EPA MCL)

Detected but within current EPA limits. PFAS do not break down in the environment and can accumulate in the body over time. An activated carbon filter can reduce exposure.

PFAS "forever chemicals" detected

UCMR 5 testing found 4 PFAS compounds in Rockville's water supply. PFAS are synthetic chemicals that persist indefinitely in the environment and the human body.

Compound Level EPA MCL Status
lithium 14.0000 µg/L 0.004 µg/L Within Limit
PFPeA 0.0060 µg/L 0.004 µg/L Within Limit
PFHxA 0.0055 µg/L 0.004 µg/L Within Limit
PFBS 0.0054 µg/L 0.004 µg/L Within Limit

Violation history

Rockville's water system has 1,898 total violations on record, including 384 health-based violations. 257 remain unresolved. 11 violations were issued in the last 5 years.

MRMONTTMCLOther
Most recent violations:
Sep 2025 Chlorine Resolved
Aug 2025 Revised Total Coliform Rule Resolved
Aug 2025 Chlorine Resolved
Jul 2025 Revised Total Coliform Rule Resolved
Jan 2023 Combined Radium (-226 and -228) Resolved

Flood & environmental risk

Hanover County has experienced 6 federally declared disasters since 1999. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies. Local water sources include South Anna River, Fine Creek, Wellesley Lake, Canterbury, Wyndham Lake.

HURRICANE FLORENCE
Hurricane FEMA DR-3403
HURRICANE SANDY
Hurricane FEMA DR-3359
HURRICANE IRENE
Hurricane FEMA DR-4024

Where does Rockville's water come from?

Rockville's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 165 water systems serving approximately 72,337 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment. Nearby water bodies include South Anna River (river), Fine Creek (river), Wellesley Lake (lake), Canterbury (lake), Wyndham Lake (lake).

What Rockville residents can do

Install a water filter

Recommended: Activated carbon or reverse osmosis filter. This addresses the specific contaminants found in Rockville's water.

Request your utility's CCR

Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.

Monitor alerts during storms

Rockville's area has a history of flooding. After severe weather, watch for boil water advisories from your local utility.

Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.

Contaminant Alerts

Top contaminants to know

View all ↓
Lead (90th percentile)
Inorganic / Heavy Metal
Safe
0.0 ppb
EPA Action Level: 15 ppb · 0% of limit
Safe Level
Copper (90th percentile)
Inorganic
Over Limit
6.00 mg/L
EPA Action Level: 1.3 mg/L · +20% over limit
Exceeds Limit
lithium
PFAS / Forever Chemical
Near MCL
14.0000 µg/L
EPA MCL: 0.004 µg/L · +20% over limit
Detected
HAA5 (Disinfection Byproducts)
Disinfection Byproduct
Safe
21.9 µg/L
EPA MCL: 60 µg/L · 37% of limit
Within LimitUCMR 4 DataHAA6Br: 4.4 µg/LHAA9: 26.3 µg/L
Chromium-6 (Hexavalent Chromium)
Inorganic
Detected
0.04 µg/L
CA MCL (no federal MCL): 10 µg/L · 0% of limit
DetectedUCMR 3 Data
Strontium
Inorganic
Detected
450.0 µg/L
EPA Health Ref Level: 1,500 µg/L · 30% of limit
DetectedUCMR 3 Data
1,4-Dioxane
Organic
Detected
0.10 µg/L
EPA Health Advisory: 0.35 µg/L · 27% of limit
DetectedUCMR 3 Data
Manganese
Inorganic
Detected
29.6 µg/L
EPA Secondary MCL: 50 µg/L · 59% of limit
DetectedUCMR 4 Data
Vanadium
Inorganic
Detected
0.38 µg/L
EPA Short-term HA: 21 µg/L · 2% of limit
DetectedUCMR 3 Data
Chlorate
Disinfection Byproduct
Over HA
360.0 µg/L
EPA Lifetime HA: 210 µg/L · +20% over limit
Over Health AdvisoryUCMR 3 Data
Molybdenum
Inorganic
Detected
1.50 µg/L
EPA Lifetime HA: 40 µg/L · 4% of limit
DetectedUCMR 3 Data
Lithium
Inorganic
Detected
14.0 µg/L
State screening level: 60 µg/L · 23% of limit
DetectedNo federal MCLUCMR 5 Data (2023–2025)
PFAS Testing

Forever chemicals overview

National PFAS report →
30
Compounds tested
4
Detected
0
Exceed EPA MCL
Compliance Record

Violation summary

1898
Total violations
384
Health-based
257
Active / unresolved
Sep 2025
Most recent violation
Compliance Record

Violations & advisories

1898 Total
257 Active
384 Health-based
1641 Resolved
8 SNC
Violations by category
Volatile Organic Chemicals
514
Total Coliform Rule
432
Inorganic Chemicals
172
Stage 1 Disinfectants and Disinfection Byproducts Rule
155
Radionuclides and Revised Rad Rule
113
Jan 2023 Active
Stage 1 Disinfectants and Disinfection Byproducts Rule
Treatment Technique
Health-Based Health 0
May 2022 Active
E. COLI
Monitoring & Reporting
Monitoring & Reporting 0
Oct 2017 Active
Lead and Copper Rule
Monitoring & Reporting
Monitoring & Reporting 0
Oct 2016 Active
Lead and Copper Rule
Monitoring & Reporting
Monitoring & Reporting 0
Jun 2015 Active
E. COLI
Monitoring & Reporting
Monitoring & Reporting 0
Mar 2015 Active
Lead and Copper Rule
Monitoring & Reporting
Monitoring & Reporting 0
Dec 2014 Active
E. COLI
Monitoring & Reporting
Monitoring & Reporting 0
Dec 2014 Active
E. COLI
Monitoring & Reporting
Monitoring & Reporting 0
Jul 2014 Active
Consumer Confidence Rule
Other Violation 0
Jan 2014 Active
Lead and Copper Rule
Monitoring & Reporting
Monitoring & Reporting 0
Jun 2013 Active
E. COLI
Monitoring & Reporting
Monitoring & Reporting 0
Apr 2013 Active
Public Notice
Other Violation 0
Feb 2013 Active
E. COLI
Monitoring & Reporting
Monitoring & Reporting 0
Nov 2012 Active
Lead and Copper Rule
Treatment Technique
Health-Based Health 0
Nov 2012 Active
Lead and Copper Rule
Treatment Technique
Health-Based Health 0
Jul 2012 Active
Lead and Copper Rule
Monitoring & Reporting
Monitoring & Reporting 0
Jul 2012 Active
Consumer Confidence Rule
Other Violation 0
Feb 2012 Active
Stage 1 Disinfectants and Disinfection Byproducts Rule
Treatment Technique
Health-Based Health 0
Dec 2011 Active
Public Notice
Other Violation 0
Dec 2011 Active
Public Notice
Other Violation 0
Showing 20 of 1898 violations
Environmental Risk

Drought conditions

D3 — extreme drought

Albemarle County is currently in D3 (extreme drought) per the U.S. Drought Monitor (week of May 5, 2026). Drought can elevate disinfection-byproduct (TTHM/HAA5) levels and taste/odor issues as utilities draw from lower reservoirs.

14
Weeks at D2+ (current streak)
11.3%
Months in D2+ (last 30y)
14
Weeks at D2+ (last 5y)

Source: U.S. Drought Monitor, updated weekly by NDMC, USDA, and NOAA.

Environmental Risk

Flood & disaster history

6
Declared disasters
Sep 2018
Most recent
Hurricane
Most common type

Hanover County has experienced 6 federally declared disasters since 1999. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.

Sep 2018
HURRICANE FLORENCE
Hurricane FEMA #3403
Oct 2012
HURRICANE SANDY
Hurricane FEMA #3359
Sep 2011
HURRICANE IRENE
Hurricane FEMA #4024
Sep 2005
HURRICANE KATRINA EVACUATION
Hurricane FEMA #3240
Sep 2003
HURRICANE ISABEL
Hurricane FEMA #1491
Sep 1999
HURRICANE FLOYD MAJOR DISASTER DECLARATIONS
Hurricane FEMA #1293
Filter Recommendations

Recommended water filters

Based on contaminants detected in Rockville's water supply, we recommend the following filter types.

🧪
For PFAS
Reverse Osmosis or Activated Carbon Block
4 PFAS compounds detected
🔧
For Copper
Reverse Osmosis or KDF Filter
Copper exceeds the EPA action level of 1.3 mg/L
All Tested Contaminants

Full contaminants report

Contaminant Detected Level EPA Limit Unit Category Status
Lead (90th percentile) 0.0 15 ppb Inorganic Safe
Copper (90th percentile) 6.00 1.3 mg/L Inorganic Over Limit
11Cl-PF3OUdS ND HI µg/L PFAS Not Detected
4:2 FTS ND HI µg/L PFAS Not Detected
6:2 FTS ND HI µg/L PFAS Not Detected
8:2 FTS ND HI µg/L PFAS Not Detected
9Cl-PF3ONS ND HI µg/L PFAS Not Detected
ADONA ND HI µg/L PFAS Not Detected
HFPO-DA ND 0.01 µg/L PFAS Not Detected
lithium 14.000 HI µg/L PFAS Detected
NEtFOSAA ND HI µg/L PFAS Not Detected
NFDHA ND HI µg/L PFAS Not Detected
NMeFOSAA ND HI µg/L PFAS Not Detected
PFBA ND HI µg/L PFAS Not Detected
PFBS 0.005 HI µg/L PFAS Detected
PFDA ND HI µg/L PFAS Not Detected
PFDoA ND HI µg/L PFAS Not Detected
PFEESA ND HI µg/L PFAS Not Detected
PFHpA ND HI µg/L PFAS Not Detected
PFHpS ND HI µg/L PFAS Not Detected
PFHxA 0.005 HI µg/L PFAS Detected
PFHxS ND HI µg/L PFAS Not Detected
PFMBA ND HI µg/L PFAS Not Detected
PFMPA ND HI µg/L PFAS Not Detected
PFNA ND HI µg/L PFAS Not Detected
PFOA ND 0.004 µg/L PFAS Not Detected
PFOS ND 0.004 µg/L PFAS Not Detected
PFPeA 0.006 HI µg/L PFAS Detected
PFPeS ND HI µg/L PFAS Not Detected
PFTA ND HI µg/L PFAS Not Detected
PFTrDA ND HI µg/L PFAS Not Detected
PFUnA ND HI µg/L PFAS Not Detected
Data source: EPA SDWIS, UCMR 5, local utility CCR.
Lead Level History

Lead level trend (90th percentile)

EPA action level: 15 ppb
↘ Lead has decreased by 19.0 ppb from 1992 (19.0 ppb) to 2025 (0.0 ppb).
Copper Level History

Copper level trend (90th percentile)

EPA action level: 1.3 mg/L
↗ Copper has increased by 3.710 mg/L from 1993 (2.290 mg/L) to 2022 (6.000 mg/L).
Contaminant Rankings

See how Rockville compares by contaminant

Explore where Rockville ranks among all Virginia cities for specific contaminants.

Pb
Lead in Virginia
Cities ranked by 90th percentile lead level (ppb)
→
PF
PFAS in Virginia
Cities ranked by PFAS compounds detected
→
Cu
Copper in Virginia
Cities ranked by 90th percentile copper level (mg/L)
→
Infrastructure

Water source & infrastructure

Primary Source
Surface Water
Operator
Private
Population Served
72,337
Water Systems
165
Source breakdown
Groundwater
153
Purchased Surface Water
10
Surface Water
2
Water Source

Where Rockville's water comes from

Surface Water

Rockville's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.

Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards.

These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge.

The system is operated by private ownership and serves approximately 72,337 people through 165 water systems.

Local Hydrology

Water bodies near Rockville

Rockville is located near 5 notable water bodies. As a surface water system, these water bodies may directly influence the city's drinking water supply.

South Anna River
river
Fine Creek
river
Wellesley Lake
lake
Canterbury
lake
Wyndham Lake
lake
Infrastructure

Water systems serving Rockville

System Name PWSID Population Source
LAKE MONTICELLO VA2065480 12,933 SW
LAKE LAND`OR VA6033450 4,818 GW
POWHATAN COURTHOUSE VA4145675 3,005 GW
LAKE CAROLINE VA6033425 2,933 SW
MOUNTAIN VIEW VA2023020 2,773 GW
LAKE WILDERNESS VA6177251 2,513 GW
CAPTAINS COVE VA3001100 2,380 GW
SPRING MEADOWS-MEADOW GATE VA4085770 2,362 GW
LAKE HOLIDAY ESTATES VA2069650 2,130 GW
RAINBOW FOREST VA2023480 1,665 GW
MAYFIELD FARMS VA4085525 1,444 SWP
QUEENS LAKE SYSTEM VA3199700 1,375 SWP
AVONDALE VA4085047 1,285 GW
IRVINGTON COMMUNITY OF VA4103550 1,056 GW
OAK SPRINGS VA4101600 985 GW
PRESIDENTIAL LAKES, SECT. 14 VA6099500 951 GW
MANAKIN FARMS VA4075500 948 GW
WHITE OAK ESTATES VA2023740 930 GW
CHERRYDALE SUBDIVISION VA4085140 928 GW
STONEY CREEK VILLAGE VA2125950 895 GW
WHITE STONE VA4103980 825 GW
YORK TERRACE SYSTEM VA3199995 755 SWP
RURAL POINT CENTRAL VA4085740 690 GW
WEEMS VA4103830 678 GW
OAKWOOD/PARKVIEW VA2023470 630 GW
NELSON PARK VA3199510 530 SWP
EARLYSVILLE FOREST VA2003255 488 GW
REEDVILLE, TOWN OF VA4133720 480 GW
LIVELY, COMMUNITY OF VA4103800 477 GW
HANOVER FARMS VA4085350 471 GW
GWYNNFIELD SUBDIVISION VA4057400 398 GW
CALLAO VA4133160 393 GW
LAKE SHAWNEE ESTATES VA4145510 379 GW
CAMPBELL`S CREEK SUBDIVISION VA6033050 375 GW
FIVE LAKES NO 1 VA4127198 360 GW
HEATHERSTONE/BOTETOURT FOREST VA2023410 356 GW
VENTER HEIGHTS SUBDIVISION VA4101800 350 GW
BLUE RIDGE HEIGHTS VA2023060 338 GW
SHAWNEE LAND VA2069525 330 GW
MILL QUARTER PLANTATION VA4145600 330 GW
TOWN OF SALUDA VA4119600 323 GW
INDIAN CREEK ESTATES VA4133400 318 GW
CHESDIN MANOR SUBDIVISION VA3053248 315 GW
HEATHSVILLE VA4133360 306 GW
FOX RUN/CHAMPION FOREST SHORES VA5117350 303 GW
WALNUT GROVE NO 1 VA4085902 290 GW
GREAT CREEK LANDING VA5117371 290 GW
CHESAPEAKE BAY ESTATES VA4133200 288 GW
HOLLY RIDGE NO 1 VA4085415 279 SWP
MALLARD BAY SUBDIVISION VA4133620 264 GW
COLONIAL FOREST VA4085155 246 GW
BROOKWOOD MANOR VA4127055 230 GW
LAKESIDE VILLAGE VA5049400 220 GW
JAMES RIVER ESTATES VA4075400 219 SWP
FOXWELLS VA4103350 218 GW
YELLOW MOUNTAIN VILLAGE VA2161665 205 GW
JOYCEVILLE-HOLLY GROVE VA5117390 205 GW
LOTTSBURG VA4133560 201 GW
WHITE SAND HARBOUR VA4133890 200 GW
FRANKLIN ACRES VA5067238 200 GW
DUTCH HOLLOW SUBDIVISION VA6047065 200 GW
KINSALE, TOWN OF VA4193600 198 GW
WILDWOOD FOREST VA6047955 188 GW
PELHAM MANOR VA6047400 183 GW
LUTTRELLVILLE VA4159500 175 GW
HIGH POINT FARMS NO. 1 VA4085390 170 GW
CARVER GARDENS VA3199200 163 SWP
CEDARBROOKE SUBDIVISION VA6047038 163 GW
BURGESS VA4133120 160 GW
OVERLOOK HEIGHTS COMBINED VA6047391 160 GW
WOODRUFF SUBDIVISION VA4101950 153 GW
WINDY GAP MOUNTAIN VILLAGE VA5067980 150 GW
HOLLER SUBDIVISION VA2171350 145 GW
MASSANUTTEN VIEW SUBDIVISION VA2171475 145 GW
STONY SPRINGS SUBDIVISION VA3053915 145 GW
SANDY POINT SUBDIVISION VA4193840 143 GW
BELLS COVE SUBDIVISION VA4133080 140 GW
CEDAR POINTE VA4119300 138 GW
LEWISETTA VA4133480 138 GW
NOMINI BAY FARMS VA4193675 138 GW
ELSINORE SUBDIVISION VA6033200 138 GW
BRITISH WOODS VA2023140 135 GW
TIMBUCTU SUBDIVISION VA5117846 132 GW
CHURCHILL SUBDIVISION VA6047041 130 GW
RIVERBEND ESTATES VA4133760 129 GW
LANCASTER COURTHOUSE VA4103680 125 GW
TARTAN VA4103630 123 GW
ANCHOR COVE SUBDIVISION VA5117096 120 GW
MERRYMOUNT SUBDIVISION VA5117450 118 GW
TANGLEWOOD SECTION U VA5117833 118 GW
MERRIMAC SOUTH VA6047330 118 GW
CROZIER VA4075100 115 GW
GLEBE POINT VA4133320 111 GW
COLUMBIA VA2065120 110 GW
BUCKHEAD SUBDIVISION VA5117125 110 GW
COVE COLONY VA4103250 105 GW
CHESAPEAKE SHORES VA4115400 103 GW
BON HARBOURS VA4133100 96 GW
HORNERS BEACH VA4193560 95 GW
SIOUAN SHORES VA5025625 95 GW
PALMYRA VA2065540 90 GW
RYAN SUBDIVISION VA2171683 90 GW
WINDSOR PARK VA4127895 90 GW
ST. TAMMANY LANDING VA5117831 90 GW
TWIN CEDARS VA6033700 90 GW
GLENDALE ACRES VA4036280 87 GW
CORBIN - LEWIS ESTATES VA4103225 87 GW
FOREST HILLS SUBD VA4103338 85 GW
PLEASANT GROVE SUBDIVISION VA5025570 85 GW
LONG BRANCH SHORES VA5117419 85 GW
COBBS SHORES VA4115450 83 GW
HERITAGE ESTATES VA6047300 80 GW
MOUNTAIN VIEW TRAILER PARK VA6047340 80 GW
BUSHFIELD VA4193200 78 GW
WICOMICO CHURCH VA4133900 75 GW
ACHSAH ACRES VA6113100 75 GW
BLACK STUMP VA4103130 73 GW
STAGECOACH HILLS VA2065781 70 GW
RAINIER ESTATES VA4085700 70 GW
LUCYS COVE VA4119525 70 GW
BRUNSWICK ESTATES VA5025500 70 GW
CLIFFS ON THE ROANOKE VA5117315 70 GW
EDINBURG EXTENDED VA2171315 68 GW
PINE HARBOR VA4133696 68 GW
BELL ACRES VA4159100 68 GW
LANCASTER SHORES VA4103710 63 GW
DRYSDALE SUBDIVISION VA6061125 63 GW
MILLERS SQUARE VA4057568 60 GW
PAGEBROOK VA4075630 60 SWP
OAK PARK SUBDIVISION VA6113170 60 GW
GENERAL PARKER SHORES VA4193440 58 GW
NOTTOWAY ACRES SUBDIVISION VA5025550 58 GW
VINEYARD GROVE VA4103947 57 GW
HICKS HILL SUBDIVISION VA5117378 55 GW
HAWK`S NEST POINT VA5117375 53 GW
NORTHTOWN VILLAGE VA6047360 53 GW
BALL POINT VA4103100 51 GW
CHESAPEAKE COVE VA4133203 50 GW
GRANITE HALL SHORES VA5117360 50 SWP
PEETE RIVER FARM VA5117660 50 SWP
NORMAN ACRES SUBDIVISION VA6047355 50 GW
WAVERLY SUBDIVISION VA4103950 49 GW
MARYFIELD SUB. VA4057566 48 GW
BLACK CREEK SUBDIVISION VA4101030 48 GW
CATALPA SUBDIVISION VA6047025 48 GW
CHURCHFIELDS VA4103200 45 GW
SLOOP POINTE VA4103825 45 GW
SCHOOLHOUSE MEADOWS VA4159800 45 GW
DAINGERFIELD SUBDIVISION VA4057250 43 GW
FOREST VIEW SUBDIVISION VA6047230 43 GW
BROWNS STORE VA4133110 42 GW
LANE VIEW SUBDIVISION VA5025480 39 GW
WOLFTRAP WOODS VA6137900 38 GW
ROLLING ACRES VA3081730 36 GW
TANGLEWOOD SECTION A VA5117834 35 GW
WESTOVER ESTATES VA6047865 35 GW
VALLEY VIEW VA6113500 33 GW
SUNNYBROOK SUBDIVISION VA5025650 30 GW
PLEASANT VIEW ESTATES VA4159700 28 GW
HAZEL RIVER VA6047260 28 GW
SPRINGWOOD SUBDIVISION VA6047475 28 GW
HIGHBANK VA4103540 25 GW
MILBURN SUBDIVISION VA4103817 25 GW
WICOMICO RIDGE VA4133920 25 GW
GIBSON MILLS SUBDIVISION VA6047250 25 GW
Regional Comparison

How Rockville compares

Full Virginia rankings →

Rockville's score of 39.7/100 is below the average of 85/100 among major Virginia cities. 10 of 10 nearby cities score higher.

Rockville (this city)
39.7
Herndon
75.5
Virginia Beach City
90.8
Newport News City
85.6
Chesterfield
80.7
Ashburn
87
Virginia avg
85
Regional Comparison

Nearby cities

View Virginia rankings →
Herndon
Virginia
B
Score: 75.5 · 23 violations · 1.1M residents
View report →
Virginia Beach City
Virginia
A
Score: 90.8 · 37 violations · 461K residents
View report →
Newport News City
Virginia
A-
Score: 85.6 · 38 violations · 424K residents
View report →
Chesterfield
Virginia
B+
Score: 80.7 · 52 violations · 390K residents
View report →
Ashburn
Virginia
A-
Score: 87 · 14 violations · 335K residents
View report →
Henrico
Virginia
A
Score: 92.8 · 4 violations · 330K residents
View report →
Woodbridge
Virginia
B+
Score: 81.2 · 4 violations · 307K residents
View report →
Norfolk City
Virginia
B+
Score: 80.9 · 19 violations · 291K residents
View report →
Richmond City
Virginia
A
Score: 93.8 · 25 violations · 229K residents
View report →
Arlington
Virginia
B
Score: 78.2 · 88 violations · 216K residents
View report →

Learn more about your water

Guides and resources related to Rockville's water quality findings.

Copper Contaminant Profile
EPA action levels, health effects, and copper removal options.
Read more →
PFAS Contaminant Profile
Detailed profile on PFAS contamination in US water systems.
Read more →
PFAS Forever Chemicals Explained
Learn what PFAS are, how they get into water, and what filtration removes them.
Read more →
County Data

Explore water quality across Fluvanna

Fluvanna Water Quality Rankings
Compare all cities in the county — grades, violations, and contaminant data side by side.
→
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FAQ

Frequently asked questions

Is Rockville, VA tap water safe to drink?

Rockville's water quality earned a grade of F (39.7/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #226 out of 230 cities tested in Virginia.

What contaminants are in Rockville's water?

Lead was measured at 0.0 ppb (90th percentile). 4 PFAS compounds were detected. 1898 violations are on record.

How is Rockville's water quality grade calculated?

The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.

Do I need a water filter in Rockville?

PFAS compounds have been detected. A filter with activated carbon can help reduce exposure.

Where does Rockville's water come from?

Rockville's water is sourced from Surface water. The city has 165 water systems serving approximately 72,337 residents.

What health violations has Rockville's water system had?

Rockville has 384 health-based violations on record. The most recent violation was recorded in September 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 257 violations remain unresolved.

Why does Rockville have so many PFAS compounds in its water?

4 different PFAS "forever chemical" compounds were detected in Rockville's water supply during UCMR 5 testing. PFAS contamination often originates from proximity to military installations (AFFF firefighting foam), airports, industrial manufacturing sites, or wastewater treatment facilities. While detected, current levels are within EPA limits. An activated carbon filter can further reduce exposure.

How does Rockville's water compare to other cities?

Rockville ranks #226 out of 230 cities in Virginia (better than 2% of state cities) and #15227 out of 15744 cities nationally (3th percentile). The grade of F reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.