Water Testing

A contractor, SCI Engineering, Inc., conducted testing on 26 water sources within the building. The preliminary results indicated one water source in the building with the following lead concentration at or above 5 ppb:

• Kettle faucet in the kitchen — 12.3 ppb

This source is not used as a primary source of drinking water. To ensure this is clear for our students and staff, we will be adding signage to this faucet noting that the water is not for drinking.

See report

September 2024 Update: In September, the faucet in the kitchen was retested and the preliminary result indicated that the water source does not have concentrations of lead over 5 ppb.

A contractor, SCI Engineering, Inc., conducted testing on 38 water sources within the building. The preliminary results indicated five water sources in the building with the following lead concentration at or above 5 ppb:

• Kettle faucet in the kitchen — 6.04 ppb

• Kettle faucet in the kitchen — 11.6 ppb

• Kettle faucet wand in the kitchen — 16.8 ppb

• Sink in lactation room — 6.2 ppb

• Sink in room 101 — 7.571 ppb

None of the water sources identified are used as a primary source of drinking water. To ensure this is clear for our students and staff, we will be adding signage to these faucets noting that the water is not for drinking.

See report

September 2024 Update: In September, all water sources were retested and the preliminary result indicated that the water sources do not have concentrations of lead over 5 ppb.

A contractor, SCI Engineering, Inc., conducted testing on 80 water sources within the building. The preliminary results indicated three water sources in the building with the following lead concentration at or above 5 ppb:

• Sink in room 315 — 5.92 ppb

• Sink in room 426 — 7.52 ppb

• Faucet basin in the kitchen — 6.34 ppb

None of the water sources identified are used as a primary source of drinking water. To ensure this is clear for our students and staff, we will be adding signage to these faucets noting that the water is not for drinking.

See report

September 2024 Update: In September, the faucet in the kitchen was retested and the preliminary result indicated that the water source does not have concentrations of lead over 5 ppb. The other water sources are in the process of being remediated and will be retested.

January 2025 Update: In December, the sink in room 426 was retested and the preliminary result indicated that the water source does not have concentrations of lead over 5 ppb. The final water source was retested and results returned with lead concentrations over 5 ppb, so it is continuing to be remediated and will be retested.

A contractor, SCI Engineering, Inc., conducted testing on 49 water sources within the building. The preliminary results indicated five water sources in the building with the following lead concentration at or above 5 ppb:

• Sink in room 1 — 7.85 ppb

• Water fountain in room 1 — 11.5 ppb

• Sink in room 3 — 20.6 ppb

• Water fountain attached to the sink in room 3 — 6.03 ppb

• Left sink in room 5 — 5 ppb

The drinking fountains identified has been turned off and marked out of order until they can be removed or repaired/replaced. The water other sources identified are not used as a primary source of drinking water. To ensure this is clear for our students and staff, we will be adding signage to these faucets noting that the water is not for drinking. 

See report

September 2024 Update: In August, the sink and water fountain in room 1 and the sink in room 5 were retested and the preliminary result indicated that the water sources do not have concentrations of lead over 5 ppb. The sink and water fountain in room 3 was also retested and returned with a lead concentration of 7.69 ppb, above the legal concentrations, and will remain out of use for additional remediation and retesting.

January 2025 Update: In December, the sink and water fountain in room 3 was retested and returned with a lead concentration of 7.28 ppb, above the legal concentrations, and will remain out of use for additional remediation and retesting.

A contractor, SCI Engineering, Inc., conducted testing on 39 water sources within the building. The results of testing indicated no water sources had lead concentrations at or above 5 ppb.

See report

A contractor, SCI Engineering, Inc., conducted testing on 22 water sources within the building. The preliminary results indicated three water sources in the building with the following lead concentration at or above 5 ppb:

• Kettle wand in the kitchen — 11.7 ppb

• Kettle faucet in the kitchen — 89 ppb

• Sink in the kitchen — 5.51 ppb

None of the water sources identified are used as a primary source of drinking water. To ensure this is clear for our students and staff, we will be adding signage to these faucets noting that the water is not for drinking.

See report

August 2024 Update: In August, all water sources were retested and the preliminary result indicated that the water sources do not have concentrations of lead over 5 ppb. The kettle faucet was removed from service.

A contractor, SCI Engineering, Inc., conducted testing on 61 water sources within the building. The preliminary results indicated 21 water sources in the building with the following lead concentration at or above 5 ppb:

• Kettle faucet in the kitchen — 12 ppb

• Sink in room 1 — 7.9 ppb

• Sink in room 2 — 8.69 ppb

• Sink in room 3 — 7.43 ppb

• Drinking fountain in room 3 — 8.32 ppb

• Sink in room 4 — 103 ppb

• Drinking fountain in room 5 — 8.64 ppb

• Sink in room 5 — 18.9 ppb

• Drinking fountain in room 11 — 9.17 ppb

• Sink in room 11 — 9.09 ppb

• Sink in room 12 — 5.48 ppb

• Sink in room 13 — 27.4 ppb

• Drinking fountain in room 14 — 8.58 ppb

• Sink in room 14 — 8.49 ppb

• Sink in room 15 — 8.59 ppb

• Sink in room 38 — 20.2 ppb

• Sink in room 39 — 5.53 ppb

• Sink in room 40 — 9.62 ppb

• Sink in room 41 — 5.39 ppb

• Sink in room 42 — 10.8 ppb

• Sink in room 44 — 34.4 ppb

The drinking fountains identified has been turned off and marked out of order until they can be removed or repaired/replaced. The water other sources identified are not used as a primary source of drinking water. To ensure this is clear for our students and staff, we will be adding signage to these faucets noting that the water is not for drinking. 

See report

September 2024 Update: In August, the faucet in the kitchen was retested and the preliminary result indicated that the water source does not have concentrations of lead over 5 ppb. The other water sources are in the process of being remediated and will be retested.

January 2025 Update: In December, the sinks in rooms 11, 13, 14, 15, 38 and 39 were retested and the preliminary result indicated that the water source does not have concentrations of lead over 5 ppb. The other water sources were retested and results returned with lead concentrations over 5 ppb, so they are continuing to be remediated and will be retested. The drinking fountain in rooms 3, 5, 11 and 15 were removed.

A contractor, SCI Engineering, Inc., conducted testing on 98 water sources within the building. The preliminary results indicated seven water sources in the building with the following lead concentration at or above 5 ppb:

• Sink in room 21 — 6.39 ppb

• Sink in room 18 — 6.05 ppb

• Sink in room 161 — 11.3 ppb

• Sink in room 165 — 66.9 ppb

• Sink in room 219 — 7.99 ppb

• Sink in room 230 — 16.1 ppb

• Sink in room 260 — 18.3 ppb

None of the water sources identified are used as a primary source of drinking water. To ensure this is clear for our students and staff, we will be adding signage to these faucets noting that the water is not for drinking.

See report

January 2025 Update: In December, the sinks in rooms 21, 18, 161, 219 and 260 were retested and the preliminary result indicated that the water source does not have concentrations of lead over 5 ppb. The remaining two water sources were retested and results returned with lead concentrations over 5 ppb, so they are continuing to be remediated and will be retested.

A contractor, SCI Engineering, Inc., conducted testing on 83 water sources within the building. The preliminary results indicated 10 water sources in the building with the following lead concentration at or above 5 ppb:

• Sink in the library — 6.61 ppb

• Basin faucet in the kitchen — 73.2 ppb

• Sink in room 206 — 19.3 ppb

• Sprayer in room 206 — 7.9 ppb

• Sink in room 209 — 46.6 ppb

• Sprayer in room 209 — 12.6 ppb

• Sink in room 309 — 21.6 ppb

• Sink in room 314 — 9.66 ppb

• Sink in room 326 — 32.4 ppb

• Sprayer in room 326 — 15.5 ppb

None of the water sources identified are used as a primary source of drinking water. To ensure this is clear for our students and staff, we will be adding signage to these faucets noting that the water is not for drinking.

See report

September 2024 Update: In September, the faucet in the kitchen was retested and the preliminary result indicated that the water source does not have concentrations of lead over 5 ppb. The other water sources are in the process of being remediated and will be retested.

January 2025 Update: In December, the sprayer in rooms 209 and 326 and sink in rooms 309 and 314 were retested and the preliminary result indicated that the water source does not have concentrations of lead over 5 ppb. The remaining four water sources were retested and results returned with lead concentrations over 5 ppb, so they are continuing to be remediated and will be retested. The sink in the library, which is used primarily by staff, will continue to be labeled non-potable until it is removed during upcoming construction on the building through Prop S.

A contractor, SCI Engineering, Inc., conducted testing on 150 water sources within the building. The preliminary results indicated 45 water sources in the building with the following lead concentration at or above 5 ppb:

• Sink in the kitchen — 16.7 ppb

• Sink in the kitchen — 22.3 ppb

• Prep sink in the kitchen — 88.1 ppb

• Sink in the kitchen — 8.12 ppb

• Ice maker in nurse's office — 10.1 ppb

• Sink in Stuco office — 8.6 ppb

• Sink in room 0101 — 7.35 ppb

• Sink in room 0104 — 9.45 ppb

• Sink faucet in room Al02 — 10.6 ppb

• Sink faucet in room Al02 — 12.2 ppb

• Sink faucet in room Al02 — 18.8 ppb

• Fountain sprayer in room C212 — 23 ppb

• Sink in room Fl06 — 40.5 ppb

• Countertop sink in room Fl08 — 186 ppb

• Sink in room Fl08 — 134 ppb

• Sink in room Fl08 — 522 ppb

• Table sink in room Fll2 — 61.7 ppb

• Table sink in room F112 — 68.4 ppb

• Table sink in room F112 — 64.9 ppb

• Table sink in room Fll2 — 59.1 ppb

• Table sink in room Fll2 — 61.8 ppb

• Table sink in room Fll2 — 80.8 ppb

• Table sink in room Fll2 — 60.8 ppb

• Table sink in room F112 — 57.4 ppb

• Table sink in room F112 — 60.9 ppb

• Table sink in room F112 — 13.1 ppb

• Table sink in room F112 — 65.2 ppb

• Table sink in room F112 — 65.4 ppb

• Sink in room Fll6 — 78.9 ppb

• Sink faucet in room Fll6 — 51.8 ppb

• Sink faucet in room Fll6 — 60.8 ppb

• Sink faucet in room Fll6 — 64.6 ppb

• Sink faucet in room Fll6 — 78.6 ppb

• Sink faucet in room Fll6 — 61.3 ppb

• Sink faucet in room Fll6 — 73.9 ppb

• Sink faucet in room Fll6 — 73 ppb

• Sink faucet in room Fll6 — 60.9 ppb

• Sink faucet in room Fll6 — 51.9 ppb

• Sink faucet in room Fll6 — 61.9 ppb

• Sink faucet in room Fll6 — 60 ppb

• Sink faucet in room Fll6 — 77.6 ppb

• Sink in room F200 — 42.5 ppb

• Sink in room F200 — 193 ppb

• Sink in room F200 — 24.2 ppb

• Sink in room F200 — 46.7 ppb

None of the water sources identified are used as a primary source of drinking water. To ensure this is clear for our students and staff, we will be adding signage to these faucets noting that the water is not for drinking.

See report

September 2024 Update: In August and September, the following water sources were retested and the preliminary result indicated that they do not have concentrations of lead over 5 ppb. 

• Sink in the kitchen — 16.7 ppb
• Sink in the kitchen — 22.3 ppb
• Prep sink in the kitchen — 88.1 ppb
• Sink in the kitchen — 8.12 ppb
• Ice maker in nurse's office — 10.1 ppb
• Fountain sprayer in room C212 — 23 ppb

The other water sources are in the process of being remediated and will be retested.

January 2025 Update: In December, the sink in the Stuco office and rooms 0101 and 0104 were retested and the preliminary result indicated that the water source does not have concentrations of lead over 5 ppb. The water sources in A102 are used by the theater stage crew for construction, including washing paint brushes. They are not used for drinking and will remain marked as non-potable. The science labs (F rooms) are being remodeled as part of Prop S construction work and all water sources in those rooms will be removed. Half of the rooms were redone in 2024 and the other half will be completed during summer break of 2025. Those sources will be tested and notice will be given if they exceed the 5 ppb limit.

A contractor, SCI Engineering, Inc., conducted testing on 14 water sources within the building. The results of testing indicated no water sources had lead concentrations at or above 5 ppb.

See report

A contractor, SCI Engineering, Inc., conducted testing on four water sources within the building. The results of testing indicated no water sources had lead concentrations at or above 5 ppb.

See report

A contractor, SCI Engineering, Inc., conducted testing on three water sources within the building. The preliminary results indicated one water source in the building with the following lead concentration at or above 5 ppb:

• Drinking fountain in the kitchen in the print shop — 26.7 ppb

The drinking fountain identified has been turned off and marked out of order until it can be removed or repaired/replaced.

See report

A contractor, SCI Engineering, Inc., conducted testing on one water source within the building. The results of testing indicated no water sources had lead concentrations at or above 5 ppb.

See report

Click here to see a list of potable water sources identified to be tested. Details on Pattonville's testing plan will be updated throughout the process as needed.

Lead is rarely found in source water like ground water or rivers. Typically, lead in water is the result of corrosion, or the wearing away, of lead-containing materials in the water distribution system such as pipes and faucets. Since 1986, all plumbing materials must be “lead-free.” The law currently allows plumbing materials to be up to 0.25 percent lead to be labeled as “lead-free.” While there are fewer amounts of lead used in newer water distribution systems, corrosion still occurs. When water stands in lead pipes or plumbing systems containing lead for several hours or more, the lead may dissolve into the drinking water. In such circumstances, the first water drawn from a tap in the morning typically contains the highest traces of lead.

Lead in drinking water, although rarely the sole cause of lead poisoning, can significantly increase a person’s total lead exposure. The Environmental Protection Agency (EPA) estimates that drinking water can make up 20% or more of a person’s total exposure to lead. According to the EPA (www.epa.gov), children of any age are susceptible to the effects of lead, with children under the age of 6 being most at risk. While effects may vary in scope and severity, the EPA reports that lead might lead to behavior and learning problems, lower IQ, hyperactivity, slowed growth, hearing problems and anemia. The Center for Disease Control (CDC) reports that the impact of lead exposure on children can be impacted by a variety of factors including age, nutrition, the source of exposure, length of time of the exposure and other underlying health conditions. Elevated levels of lead in women who are pregnant can also be harmful, possibly severely, to both babies and mothers. Your physician or healthcare provider can provide additional information regarding the effects of lead exposure and, with respect to one’s health history, whether testing for lead should be considered.

Yes, it is safe to drink the water in our schools and buildings from faucets that are not marked as unsafe for drinking or marked with non-potable water signage.

Potable water is water that is safe to drink and use for cooking.  Results include water sources beyond the normally considered drinking sources (water fountains) if they could be used to drink from (such as a sink to fill up water bottles).

Water can contain lead from some fixtures due to the chemical process of corrosion. This occurs when water, especially if it's acidic or has low mineral content, interacts with plumbing materials that contain lead, such as pipes, solder and fixtures. The corrosive action causes lead to leach into the water supply.

PPB stands for "parts per billion." In lead testing, it measures the concentration of lead in water. For example, 1 ppb indicates one part of lead per billion parts of water, which helps assess if the water meets safety standards.

• 5 ppb (parts per billion): This level is below the EPA action level but still above the ideal goal of zero lead. It poses some risk, particularly to young children and pregnant women, who are more vulnerable to lead exposure.

• 15 ppb: This is the EPA's action level for lead in drinking water. At this concentration, the water is considered unsafe for drinking and cooking, and immediate steps should be taken to reduce lead levels. Prolonged exposure at this level can lead to serious health issues, such as developmental delays in children, neurological damage and other adverse health effects.