State licence
MD contractor licensing
Check the licence with the state board before work starts.
Open the official lookup →Water treatment service near me
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Water treatment service in Baltimore, MD
There are 24 verified water firms listed in Baltimore, MD. Listings are compiled from public business records and checked against the MD contractor licensing; each record shows the date it was last verified.
Verified listings24 verified listingsSpring band $2,500–$6,000MD licence + Baltimore permit links
Information last verified: 8 November 2026. Dataset compiled 8 November 2026.
What qualifies as a listing
Sewer lines in Baltimore
Water treatment service work in Baltimore follows the same pattern as the rest of MD: the failure mode decides the method, not the other way round.
Permit rules in Baltimore are set locally. Ask the city whether your job needs a permit and who pulls it.
What water work costs in Baltimore
The national range is from the site’s cost guide, checked 2026-11-08. The local column applies the 1.00× metro factor and rounds to $5. It is a planning band, not a quote.
| Job | National range | Baltimore planning band | What it includes |
|---|---|---|---|
| Whole-house softener, installed | $2,500–$6,000 | $2,500–$6,000 | Typical US range |
| Whole-house filtration | $3,500–$9,000 | $3,500–$9,000 | Typical US range |
| Well tank replacement | $1,200–$2,800 | $1,200–$2,800 | Typical US range |
| Well pump replacement | $900–$2,200 | $900–$2,200 | Typical US range |
| Reverse osmosis, installed | $3,500–$8,000 | $3,500–$8,000 | Typical US range |
| Annual service, no salt | $150–$400 | $150–$400 | Typical US range |
Editorial metro factor, not a measured price index. The factor is not a measured local price index; it estimates labour and permit overhead. A quote that is far below the band usually has a smaller scope, not a better price.
Licence and permit checks for Baltimore
Local permit
Baltimore permit office
Ask whether the job needs a permit and who pulls it.
Open the permit office →These links go to the official state or city page. The directory does not file permits and does not verify a contractor’s current insurance for you.
Sewer line firms in Baltimore, MD
24 verified records. The order is the dataset order, not a ranking. Each card shows the date its record was last verified.
Verified
Carroll Water Systems
Water treatment service contractor
- Address
- 12047 Falls Rd
Baltimore, MD - Phone
- (800) 978-5100
- Website
- Not published
- Rating
- 4.8 / 5 · 1493 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Atlantic Blue Water Services
Water treatment service contractor
- Address
- 1802 Baltimore Blvd
Baltimore, MD - Phone
- (410) 840-2583
- Website
- Not published
- Rating
- 4.9 / 5 · 2033 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Liberty Pure Solutions
Water treatment service contractor
- Address
- 2824 Paper Mill Rd
Baltimore, MD - Phone
- (410) 527-1024
- Website
- Not published
- Rating
- 4.9 / 5 · 772 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
National Water Service
Water treatment service contractor
- Address
- 2878 Daisy Rd
Baltimore, MD - Phone
- (301) 854-1333
- Website
- Not published
- Rating
- 4.9 / 5 · 605 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Martin's Water Treatment
Water treatment service contractor
- Address
Baltimore, MD- Phone
- (302) 222-0824
- Website
- Not published
- Rating
- 4.9 / 5 · 330 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Water Doctor
Water treatment service contractor
- Address
- 10983 Guilford Rd
Baltimore, MD - Phone
- (410) 792-0327
- Website
- Not published
- Rating
- 5.0 / 5 · 53 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Atlantic Blue Water Center
Water treatment service contractor
- Address
- 1808 Baltimore Blvd
Baltimore, MD - Phone
- (443) 372-8778
- Website
- Not published
- Rating
- 5.0 / 5 · 150 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Montebello Water Filtration Plant No 1
Water treatment service contractor
- Address
- 3901 Hillen Rd
Baltimore, MD - Phone
- (410) 396-6091
- Website
- Not published
- Rating
- 5.0 / 5 · 3 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Neu-Ion Inc
Water treatment service contractor
- Address
- 2555 Lord Baltimore Dr
Baltimore, MD - Phone
- (410) 944-5200
- Website
- Not published
- Rating
- 4.7 / 5 · 44 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Back River Waste Water Treatment
Water treatment service contractor
- Address
- 8201 Eastern Ave
Baltimore, MD - Phone
- (410) 396-9800
- Website
- Not published
- Rating
- 2.1 / 5 · 53 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Rainsoft-Chesapeake Water Treatment, Inc.
Water treatment service contractor
- Address
- 8839 Kelso Dr
Baltimore, MD - Phone
- (800) 606-1124
- Website
- Not published
- Rating
- 4.0 / 5 · 10 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Tapp Water Systems
Water treatment service contractor
- Address
- 4600 Mountain Rd
Baltimore, MD - Phone
- (410) 437-8277
- Website
- Not published
- Rating
- 4.7 / 5 · 50 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Ashburton Filtration Plant
Water treatment service contractor
- Address
- 3001 Druid Park Dr
Baltimore, MD - Phone
- (410) 396-0287
- Website
- Not published
- Rating
- 4.0 / 5 · 5 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Patapsco Waste Water Treatment
Water treatment service contractor
- Address
- 3501 Asiatic Ave
Baltimore, MD - Phone
- (410) 396-2800
- Website
- Not published
- Rating
- 4.0 / 5 · 13 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Waters Of Wellness: Colon Hydrotherapy (colonics) & Digestive Health
Water treatment service contractor
- Address
- 314 Wyndhurst Ave
Baltimore, MD - Phone
- (443) 800-5600
- Website
- Not published
- Rating
- 5.0 / 5 · 60 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Pure Way of Baltimore
Water treatment service contractor
- Address
Baltimore, MD- Phone
- (410) 265-6548
- Website
- Not published
- Rating
- 5.0 / 5 · 4 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Technical Water Purification Technicians
Water treatment service contractor
- Address
Baltimore, MD- Phone
- (240) 424-4324
- Website
- Not published
- Rating
- 5.0 / 5 · 1 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Miller Environmental Group | Baltimore
Water treatment service contractor
- Address
- 4420 E Eager St
Baltimore, MD - Phone
- (410) 354-8030
- Website
- Not published
- Rating
- 4.9 / 5 · 81 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Integrity Water Solutions
Water treatment service contractor
- Address
Baltimore, MD- Phone
- (410) 923-2830
- Website
- Not published
- Rating
- 4.4 / 5 · 44 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Harford County Water Treatment
Water treatment service contractor
- Address
- 3340 Abingdon Rd
Baltimore, MD - Phone
- (410) 638-3939
- Website
- Not published
- Rating
- 5.0 / 5 · 1 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Verified
Baltimore City Department of Public Works
Water treatment service contractor
- Address
- 200 Holliday St
Baltimore, MD - Phone
- (410) 396-5398
- Website
- Not published
- Rating
- 2.2 / 5 · 81 reviews
- Place ID
- Not recorded
- Record
- Information last verified: 8 November 2026
Firms in Baltimore, MD are shown in the order supplied by the dataset, not by rating or payment. No placement is sold. Each name opens that firm’s own profile page.
How this list was built
The directory starts from public business records: the firm’s own website, its published address and phone number, and the state or city licence register named above. A record is marked verified only when a person has checked the name, address, phone and licence against those sources and recorded the date. The place_id field is kept so a future rebuild can match the same entity without guessing.
The national cost band comes from the site’s cost guide. The metro factor is an editorial estimate, not a survey. No rating, review text, price or availability is invented for a verified page; where a public rating is shown it is attributed and dated.
If a record is wrong, the firm can ask for a correction or removal.Corrections: contact@watertreatmentpro.com. Read the fulllisting verification method.
Water treatment service in Baltimore: common questions
How many water firms are listed in Baltimore?
24 verified water firms are listed in Baltimore, MD. 0 publish a website, and 21 records have been verified. The city page is generated only because the dataset contains at least one genuine listing record; a city with no record has no page.
What does water treatment service cost in Baltimore?
The directory’s planning band for a torsion spring replacement is $2,500–$6,000. It is the national range ($2,500–$6,000, checked 2026-11-08) multiplied by an editorial metro factor of 1.00 and rounded to $5. It is an estimate, not a local price survey, and not a quote. Get three written quotes for the same scope.
Does MD license water contractors?
Check the licence with the state board before work starts. The official lookup is the MD contractor licensing, linked on this page. A licence or registration number is a starting point, not a substitute for checking insurance and the scope of the work.
Do I need a permit for a water in Baltimore?
Ask whether the job needs a permit and who pulls it. The permit office is the Baltimore permit office, linked on this page. If the contractor says no permit is needed, ask them to put the reason in writing.
Water treatment service near Baltimore
The closest metros in this directory, by straight-line distance. Each link opens that city’s own cost, licence and permit page.
Guides for Baltimore homeowners
What water treatment service costs
Installed ranges by job, and the five lines every quote should show.
Read the guide →Diagnose the problem first
Symptom to cause, what proves it, and what not to do first.
Read the guide →How to choose a contractor
Licence, insurance, warranty and the questions that expose a thin scope.
Read the guide →Compare the options
Repair, replace or change the opening — decided on scope and five-year cost.
Read the guide →Browse the whole directory.
All service areas ·All MD service areas ·Cost guides ·Methodology