01The verdict: is Mountain View water safe?
Mountain View's drinking water has significant quality concerns based on EPA testing data. With a grade of A- (87.1/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 2,791 residents using groundwater (wells).
5 unresolved violations on record
EPA records show open compliance items for this system. Most are administrative, but unresolved items are worth watching.
See what was cited ↓Lead is well under the limit
90th-percentile lead is 0.0 ppb — beneath the 15 ppb federal action level and under the 5 ppb watch threshold.
See the trend ↓2 violations in the last five years
Recent compliance history is the best predictor of future problems — the year-by-year record is below.
See the record ↓Mountain View's drinking water received a grade of A- (87.1 out of 100), indicating good water quality. The city's 1 water system serves approximately 2,791 residents using groundwater.
Lead levels were measured at 0.0 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program. The system has 16 violations on record, including 11 health-based violations. 5 remain unresolved.
Mountain View ranks #170 out of 487 cities in Missouri for water quality, placing it mid-range in the state. Mountain View relies on groundwater, which is generally less vulnerable to surface contamination but can be affected by naturally occurring minerals like arsenic and nitrate, as well as agricultural and industrial runoff. As a small community water system, Mountain View may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
02What's in Mountain View's water
Every contaminant flagged in Mountain View, on one shared scale: distance to its own legal limit. The red line is the limit — anything past it is out of compliance, and the closer a bar gets, the less headroom the system has.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 0.0 | 15 | ppb | Inorganic | Safe |
Cities ranked by 90th-percentile lead PF PFAS in Missouri
Cities ranked by compounds detected Cu Copper in Missouri
Cities ranked by 90th-percentile copper
03Mountain View's ten-year track record
Each box is one year. A green check means no EPA violations; a numbered badge counts that year's violations — red if any were health-based, amber if they were monitoring or paperwork issues. The system has 16 violations on record, including 11 health-based violations. 5 remain unresolved.
8 of the last ten years were clean. The numbered years had EPA violations — red when any were health-based, amber when they were paperwork or missed-testing issues.
▼ Down 0 ppb since 1993. Latest reading: 0 ppb (2023) — 0% of the action level. Sampled at higher-risk homes (90th percentile).
04Where Mountain View's water comes from
Mountain View's drinking water is drawn from underground aquifers through wells.
Groundwater
Underground aquifers reached by wells — naturally filtered, but can carry minerals like arsenic and nitrate.
Local treatment
Groundwater generally needs less treatment — typically disinfection and, where needed, mineral removal.
1 system
1 water system, operated under local government ownership.
2,791 people
Residents served across Mountain View's service area.
Groundwater is naturally filtered through rock and soil layers, generally requiring less treatment than surface water. However, it can contain naturally occurring contaminants like arsenic, radon, and minerals. Agricultural activity, septic systems, and industrial operations near well fields can introduce nitrates, pesticides, and volatile organic compounds. The system is operated by local government ownership and serves approximately 2,791 people through 1 water system.
| System name | PWSID | Population | Source |
|---|---|---|---|
| MOUNTAIN VIEW PWS | MO4010551 | 2,791 | Groundwater |
05Pressure on Mountain View's watershed
Outside forces that shape what reaches the treatment plant. None of these is a verdict on the tap by itself — but each adds pressure worth knowing about.
Industrial discharge
1 facility within 10 miles reported 0 lb released to surface water in the latest EPA Toxics Release Inventory. Proximity doesn't equal tap contamination — treatment and hydrology decide — but it's pressure on the watershed.
06How Mountain View compares
Scores for nearby Missouri cities on one line, with the average marked.
dashed line = Missouri average (67/100)
Mountain View scores 87.1/100 — above the Missouri average of 67/100. It outscores 8 of 10 nearby cities. Full Missouri rankings →
74.8 / 100BKansas City, MO
79.2 / 100FSpringfield, MO
37.1 / 100CColumbia, MO
61.4 / 100FO Fallon, MO
43.4 / 100FDes Peres, MO
36.6 / 100
Compare all cities in the county — grades, violations, and contaminant data side by side.→
07What to do at home
Steps matched to what testing actually found in Mountain View's water — not generic advice.
A basic carbon filter still helps
Mountain View's water meets federal standards, but a simple carbon filter improves taste and adds a margin of safety against short-term issues.
Compare tested filters →Read your utility's annual report
Every utility must publish a yearly Consumer Confidence Report with its own testing results. It pairs well with the independent data on this page.
How to read a CCR →Watch for Mountain View alerts
We refresh EPA data monthly and surface new violations, advisories, and boil-water notices for your county on this page.
All water alerts →Frequently asked questions
Is Mountain View, MO tap water safe to drink?
Mountain View's water quality earned a grade of A- (87.1/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #170 out of 487 cities tested in Missouri.
What contaminants are in Mountain View's water?
Lead was measured at 0.0 ppb (90th percentile). 16 violations are on record.
How is Mountain View'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 Mountain View?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Mountain View's water come from?
Mountain View's water is sourced from Groundwater. The city has 1 water system serving approximately 2,791 residents.
What health violations has Mountain View's water system had?
Mountain View has 11 health-based violations on record. The most recent violation was recorded in July 2024. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 5 violations remain unresolved.
Is Mountain View's groundwater at risk of contamination?
Mountain View uses groundwater, which can be affected by naturally occurring contaminants like arsenic, radon, and nitrate, as well as agricultural runoff and industrial activity. The system has 16 violations on record that may relate to groundwater quality. Groundwater systems are generally less susceptible to surface contamination but should be monitored for emerging contaminants like PFAS.
How does Mountain View's water compare to other cities?
Mountain View ranks #170 out of 487 cities in Missouri (better than 65% of state cities) and #4215 out of 15382 cities nationally (73th percentile). The grade of A- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Mountain View's small water system affect quality?
Mountain View's system serves approximately 2,791 residents. Small community water systems (under 3,300 people) may have fewer financial resources for infrastructure upgrades and advanced treatment technologies. However, they are held to the same EPA drinking water standards as larger systems. This system has 16 violations on record.