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If a bid set cites Ten States and AWWA, I know the job scope is already boxed in. That usually means fixed design limits, named material standards, set test steps, and a paperwork trail that can delay acceptance if even one item is missing.
Here’s the article in plain English:
My takeaway: these standards do more than guide design. They shape cost, crew skills, review risk, testing, and final acceptance.
If I’m reading a municipal utility scope, this is the first filter I use to see what must be built, how it must be installed, and what proof the owner will ask for at the end.
Ten States Standards vs. AWWA Standards: Water & Wastewater Scope Breakdown
Ten States Standards give owners a shared starting point for design criteria. That’s why the same limits keep showing up in utility scopes, basis-of-design reports, and front-end specs. The Great Lakes–Upper Mississippi River Board (GLUMRB) built the standards to set limiting values and make practice more uniform across jurisdictions[16]. Owners then carry those values into design manuals, basis-of-design reports, and front-end specs. For estimators and project managers, that translation matters. It helps teams price scope more accurately and spot approval risk before it turns into a problem.
You can see this most clearly in water distribution requirements.
When owners draft water distribution scope, a small set of Ten States-derived numbers comes up again and again. Many owner standards say mains serving fire hydrants must be at least 6 in. in diameter. Some public distribution standards set 8 in. as the minimum for public mains, based on local fire-flow targets[4][6][10].
Pressure limits show up just as often. Scope language commonly calls for at least 20 psi residual pressure at all points under peak flow conditions. Normal operating pressure is often kept around 60–80 psi, with no point below 35 psi under normal conditions[4][11][12].
Dead-end mains are another spot where owners closely track Ten States language. Standards often state that dead-end mains should be minimized by looping wherever practical. If a dead end can’t be avoided, it usually has to end with a hydrant, flushing hydrant, or blowoff sized to reach at least 2.5 ft/s flushing velocity in the main[6][7][8]. On paper, that may look like a small note. In the field, it can mean more fittings, more appurtenances, and more review risk.
The same pattern carries over to wastewater work, but the controlling limits change. Instead of pressure and flushing, the focus shifts to slope, velocity, and redundancy.
Gravity sewer scope often starts with a minimum full-flow velocity of 2.0 ft/s using Manning's formula, with n = 0.013[2][9]. Owners turn that into minimum slope tables by pipe diameter. A common example is 0.40 ft/100 ft for 8-in. pipe and 0.22 ft/100 ft for 12-in. pipe. Front-end specs often add that sewer slopes must not drop below those values unless the engineer gives specific approval[9][14][15].
Pump station scope follows the same basic idea. Ten States redundancy rules require stations to handle peak hourly flow with the largest unit out of service. Owners usually restate that directly in equipment specs as a firm capacity requirement[5][13].
Wet-well sizing adds another hard limit. Owner policies often cap detention time at 30 minutes or less at average daily flow. Some standards also set a minimum wet-well diameter of 72 in. so the structure can be built with workable dimensions[1][9].
The table below shows how common Ten States criteria turn into the wording owners place in scopes.
If Ten States sets the design limits, AWWA sets the rules for materials and installation. Owners often put AWWA references straight into Division 33 – Utilities and project specs. They do that either by citing the standard number or by adding local requirements on top. That wording tells contractors what to price, what to submit, and what to install.
For buried water mains, owner scopes often tie together AWWA C150, C151, C111, and C104. A common clause calls for ductile iron pipe that meets C151, with thickness designed under C150, cement-mortar lining under C104, and push-on or mechanical joints under C111. In one sentence, that sets the pipe class, joint type, lining, and submittal needs before buying starts.
Ductile iron pipe pressure class has a direct effect on wall thickness and cost. Many municipal guides use:
For fittings, owners usually split the spec by size and service demand. Compact ductile-iron fittings under C153 are common for smaller diameters. Standard-body ductile-iron fittings under C110 are more common for larger diameters or heavier-duty service. In most cases, fittings are expected to match the pipe lining and coating requirements.
Valves are usually scoped by valve type and pressure rating. Gate valves fall under C509/C515, butterfly valves under C504, check valves under C508, and hydrants under C502. Common working pressure ratings are 200 psi for 3–12 in. gate valves and 150 psi for 14–36 in. valves [22][23][24]. For hydrants, owners often ask for a dry-barrel unit with a 5-1/4-in. valve opening, three hose nozzles, one pumper nozzle, and a mechanical-joint shoe [3][18][20].
After the pipe and appurtenances are chosen, owners use AWWA standards to pin down corrosion protection and potable-water compliance. Linings and coatings affect corrosion, service life, and approval. Cement-mortar lining under C104 is the default choice for ductile iron distribution mains. For exterior protection in aggressive soils, owners may specify fusion-bonded epoxy under C550. In steel-pipe work, coating systems may point to C210 or C213. The corrosion setting drives that choice. Low-resistivity soils, high-chloride conditions, or marine exposure often lead owners to enhanced epoxy, polyolefin wraps, or cathodic protection.
Potable-water-contact materials should carry NSF/ANSI 61 certification. Owners usually push that requirement into the submittal package, so manufacturers have to show third-party certification for materials and linings that touch drinking water.
For non-metallic pipe, C900 is the main AWWA standard for PVC pressure pipe in the 4–12 in. range. Owners usually name the pressure class right in the spec, such as DR18 at 235 psi or DR14 at 305 psi. They may also call for blue pipe, integral bell elastomeric gasket joints, and NSF/ANSI 61 and 14 listings [17][19][21][25]. Where HDPE is allowed, C906 governs the pipe, and the scope language usually identifies the PE grade, SDR, and fusion method. Owners often add location-based limits too. A spec might allow PVC for mains 12 in. and smaller in residential streets, while requiring ductile iron under arterial roadways.
The table below condenses the AWWA standards owners most often turn into scope language.
After installation, owners don't accept the work until pressure testing, disinfection, and documentation all check out. If even one test fails, or one report is missing, the whole job can stall. Tie-ins, paving, and closeout often sit on hold until these last approval steps are cleared.
These are the final gates before a main can go into service.
For water mains, owners often tie pressure testing to AWWA C600 and Ten States Standards. In plain terms, the main has to prove it can hold pressure before anyone signs off.
Typical scope language calls for a test pressure of 1.25 to 1.5 times the working pressure. In many cases, that means not less than 150 psi at the lowest point of the test section. At the same time, the test pressure can't go above the design pressure of the pipe or thrust restraints. Most owners also want the test held for a continuous 2 hours, with pressure kept in a tight range, often ±5 psi. Leakage is then checked by measuring the makeup water required and comparing it to the owner's allowed limit.
Owners also tend to require:
Once the pressure test passes, disinfection comes next. Under AWWA C651, owners usually require high-velocity flushing first, often around 3.0 ft/s or higher, to clear out debris before chlorine is added.
The chlorine dose depends on the method used, and owners usually require a 24-hour contact period. If the schedule is tight, some owners allow the slug method at 100 mg/L for 3 hours, with a residual of at least 50 mg/L maintained through the slug period. After the contact time is met, the main is flushed, dechlorinated, and sampled.
Before the main can enter service, owners typically require two consecutive coliform-negative sample sets, taken 16 to 24 hours apart. Sample spacing is usually every 1,000 to 1,200 ft, plus the ends and branches. That may sound like a lot of sampling, but it makes sense. A clean test at one point in the line doesn't prove the whole main is ready.
Before construction starts, contractors have to submit product data, shop drawings, AWWA compliance affidavits, and NSF/ANSI 61 certifications for materials that touch potable water. Owners expect all of that to be accepted before installation begins.
After field work is done, there's a second round of paperwork. And this part matters just as much as the pipe in the ground.
Owners usually require hydrostatic test reports with time-stamped readings, leakage calculations, gauge calibration data, and pass/fail sign-off. They also want disinfection records that show chlorine dose, initial and final residuals, contact time, and the dechlorination method. On top of that, they require certified bacteriological lab results with sample locations, dates, and chain-of-custody details.
If submittals are missing or late at any point, owners often stop the next step cold. Testing, tie-ins, or service activation may not be approved until the paperwork is complete. There's also a clear rework risk: if installed materials can't be matched back to accepted submittals, owners may require removal and replacement even if the testing itself passed.
These records don't just document the job. They also make it clear which field roles need to be staffed for utility work.
That checklist drives the technical skills owners need on site.
When a scope cites Ten States and AWWA, staffing, sequencing, and closeout are driven by those standards. If you know that before mobilization, you can avoid rework, failed tests, and change-order fights. That’s why role-specific standards knowledge should be the first screen in hiring.
Each role needs a different level of standards knowledge. A project manager who can’t read utility specs may miss exclusions or misalign subcontractors. A superintendent who doesn’t grasp pressure testing sequence can leave a gap between testing and disinfection. An estimator who isn’t familiar with AWWA requirements can underprice pipe classes, valves, coatings, restrained joints, and testing.
Different utility roles need different depth. Here’s where that shows up most.
A strong candidate in any of these roles should be able to talk through specific scope items like pipe class selection, valve spacing, allowable leakage criteria, and chlorination methods, not just say they’ve done “utility work.” That kind of detail is one of the clearest signs of actual field exposure.
Those differences should shape how utility candidates are screened.
Utility hiring works better when candidate profiles show owner-spec experience, not just years on site. When iRecruit.co builds profiles for water and wastewater projects, the focus stays on owner-spec-driven work: the project types completed, the owner types served, the standards involved, and the exact technical duties handled.
For a municipal water main project, a strong profile should show ductile iron pipe experience, valve and hydrant work, service connections, pressure testing, and disinfection. For a wastewater collection project, it should show gravity sewer installation, manhole construction, infiltration/exfiltration control, and bypass pumping under public-agency specs. For a pump station, it should include mechanical and electrical coordination, equipment submittals, startup, and acceptance testing.
Candidates who have worked with municipal inspectors, managed submittal packages, or led QA/QC closeout tend to be strong fits. That’s often where Ten States and AWWA requirements create the most friction.
The same standards that define the scope also shape who can get the job through acceptance.
Standards-first scopes lower risk because they define the work, the skill needs, and the closeout requirements at the start. The payoff is practical: fewer rejected submittals, failed tests, RFIs, and scope-gap change orders. On the staffing side, it helps teams figure out early whether a job needs municipal utility experience, QA/QC depth, commissioning, or compliance-documentation skills before the wrong hire causes trouble in the field.
Standards literacy isn’t just a technical credential. It’s also a project control tool and a hiring filter.
Ten States Standards and AWWA specifications serve different purposes in utility project scoping.
Ten States Standards lay out broad design and public health criteria that state agencies use to support safe, reliable water systems. They set the baseline for how a system should be planned.
AWWA specifications, by contrast, get into the technical details. They cover material and performance standards for items like pipe, valves, and testing methods.
Put simply, Ten States Standards set the baseline, while AWWA specifications spell out the products and methods used to meet it.
Neither. Cost impact depends more on how clearly the scope spells out Ten States Standards and AWWA requirements, and how strictly those requirements are applied during design and procurement.
When the scope is vague, contractors may add 10% to 20% contingency to cover uncertainty. Owners can control costs by using these standards to set clear requirements, support steady estimates, and line up technical needs with budget limits.
Final acceptance often gets pushed back when key turnover documents for facility operations are missing or half-finished. The usual trouble spots are:
Delays can also happen when occupancy approvals aren't in place or punch list items are still open. Until those contract and legal requirements are fully wrapped up, owners will usually hold back final payment or retainage.
